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PostPosted: Fri Jan 22, 2016 6:40 am 
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This one just went to a friend/customer in Illinois. I'm going to let the photos speak for themselves. There's a detailed "build thread" on the AGF here - http://www.acousticguitarforum.com/forums/showthread.php?t=285710 - which should answer any questions you may have about this guitar's construction. I'm extremely happy with the way it came out. It really sounds amazing. Loud, responsive, well-balanced, and absolutely delicious.

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I'm happy to say it's owner, Dan, is as thrilled with it as I am.

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Last edited by Todd Rose on Fri Jan 22, 2016 9:58 am, edited 1 time in total.


These users thanked the author Todd Rose for the post: Pmaj7 (Fri Jan 22, 2016 10:02 am)
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PostPosted: Fri Jan 22, 2016 6:46 am 
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Here's a vid of Dan playing it and singing with his wife, Naomi. Shot with an inexpensive camcorder, it doesn't do justice to the guitar's sound - the camcorder's mic is lacking, especially, in bass response (the guitar is definitely NOT lacking in bass response!) - but it gives you some idea, at least.

https://www.youtube.com/watch?v=l08q6zR-Eds

(I can't figure out how to embed youtube vids here, but just click on the link, and there you are.)

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PostPosted: Fri Jan 22, 2016 6:49 am 
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Great work Todd! Thanks for sharing.

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These users thanked the author Josh H for the post: Todd Rose (Fri Jan 22, 2016 6:50 am)
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PostPosted: Fri Jan 22, 2016 7:33 am 
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Very cool Todd! A very eloquent contemporary guitar - very well done!



These users thanked the author Hesh for the post: Todd Rose (Fri Jan 22, 2016 7:36 am)
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PostPosted: Fri Jan 22, 2016 9:09 am 
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Wow! Lot of creativity in that one. The link just opens up a picture for me. What are the specs. Looks like Lutz and some very nice EIR?



These users thanked the author DannyV for the post: Todd Rose (Fri Jan 22, 2016 9:56 am)
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PostPosted: Fri Jan 22, 2016 10:02 am 
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Oops, thanks for the heads up, Danny. I copied and pasted the wrong thing there. It should be good now. Here it is again:
http://www.acousticguitarforum.com/forums/showthread.php?t=285710

Yes, Lutz and EIR.

Here's one construction pic. All the rest are in that thread.

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PostPosted: Fri Jan 22, 2016 10:06 am 
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Wow Todd! What an original design! I'm interested in the usage of that carbon fiber rod down the center. That must be one solid neck/heel joint.

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These users thanked the author Alain Desforges for the post: Todd Rose (Fri Jan 22, 2016 10:32 am)
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PostPosted: Fri Jan 22, 2016 10:14 am 
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Wow!

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These users thanked the author sdsollod for the post: Todd Rose (Fri Jan 22, 2016 10:33 am)
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PostPosted: Fri Jan 22, 2016 10:26 am 
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Congrats, Todd. Great looking guitar and great sound.

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These users thanked the author MaxBishop for the post: Todd Rose (Fri Jan 22, 2016 10:33 am)
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PostPosted: Fri Jan 22, 2016 11:36 am 
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Very nice!

I'm interested to know more about the carbon rod too.



These users thanked the author Durero for the post: Todd Rose (Fri Jan 22, 2016 1:54 pm)
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PostPosted: Sat Jan 23, 2016 9:05 am 
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You are a Artist Todd.
Great guitar!
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These users thanked the author Mike Collins for the post: Todd Rose (Sat Jan 23, 2016 10:53 am)
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PostPosted: Sat Jan 23, 2016 9:37 am 
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Todd,
I just got through your posts on the acoustic guitar forum. Fantastic work! ...and it was very gracious for you to share all of that. I do have a question... How can one screw hold all that pressure? ...and how can a threaded insert not get ripped out?
Thanks again,
Steve

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PostPosted: Sat Jan 23, 2016 2:42 pm 
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sdsollod wrote:
Todd,
I just got through your posts on the acoustic guitar forum. Fantastic work! ...and it was very gracious for you to share all of that. I do have a question... How can one screw hold all that pressure? ...and how can a threaded insert not get ripped out?
Thanks again,
Steve


Thanks, Steve!

The short answer to your question is: it's strong enough, it works. I might not have thought it would unless I'd seen guitars made with very similar neck joints (Rick Turner, Laurent Brondel), also relying on one bolt to keep the neck on. So, I knew it could be done. With my variation of the design, I've done several things that augment the strength of that bolt and insert and the whole structure. First, the grain direction of the heel means the threaded insert goes into solid side-grain, not end grain. Second, I wicked CA in around the threaded insert. I'm not sure what it would take to pull that out, but I'll bet it's several hundred pounds, at least. I would guess it would take even more than that to rip the bolt out of the insert - both are steel, steel is dang strong stuff, and the threads are reasonably coarse (20 tpi, if I recall correctly). The way the neck block is made means that the bolt head bears against end grain, which is a very hard surface, and I've also put a large washer under the bolt head to spread the load, so I don't expect any significant wood-crushing to happen there. Nor will the bolt head rip out a chunk of wood, or otherwise break the wood of the neck block, because that end grain section is backed up by the main section, which is made of birch ply. The whole neck block is also solidly braced in place by the "axial strut" (that ginormous CF-wrapped dowel spanning the two end blocks) and the ipe-capped longitudinal brace going down the center of the back -- note the foot on the neck block that bears on that brace. Bottom line: I think the whole thing is an amply strong structure.

The joint between the heel and the neck shaft would be by far the weakest link if it weren't for the CF-wrapped dowel embedded in there. Take another look at the photos of the heel construction if you're not sure what I'm talking about.

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PostPosted: Sat Jan 23, 2016 2:52 pm 
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For those of you wondering about that CF rod (the "axial strut"), I'm not sure what you want to know, but I think you're questions will probably be answered by looking at the build thread on the AGF that I linked to above. As you'll see in the photos there, it's a CF-wrapped hardwood dowel (cherry or mahogany, can't seem to remember which at this moment), made for me by J.B. Allred. The strut itself would have been amply strong if I'd just used a CF tube, but then I would have had to do more engineering of the joints at each end, because the small bearing surface of the edges of the tube would have risked crushing the wood of the end blocks under the load of string tension. Making it a solid wood-filled rod gave me enough bearing surface at each end to feel good about those interfaces, and I figured the added strength of the rod couldn't hurt.

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These users thanked the author Todd Rose for the post (total 2): ChuckH (Sat Jan 23, 2016 5:42 pm) • Durero (Sat Jan 23, 2016 4:39 pm)
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PostPosted: Sat Jan 23, 2016 3:45 pm 
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Beautiful. What is the bridge wood?

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PostPosted: Sat Jan 23, 2016 4:21 pm 
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Thanks, Chris! Honduras rosewood, same as the headplates.

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PostPosted: Sat Jan 23, 2016 4:39 pm 
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I've been loving the work you've posted recently. Great aesthetic!



These users thanked the author James Orr for the post: Todd Rose (Sun Jan 24, 2016 8:22 am)
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PostPosted: Sat Jan 23, 2016 8:09 pm 
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That's really neat, very modern looking and unique.



These users thanked the author jfmckenna for the post: Todd Rose (Sun Jan 24, 2016 8:23 am)
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PostPosted: Sat Jan 23, 2016 9:06 pm 
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Everything about that guitar is amazing!



These users thanked the author alan stassforth for the post: Todd Rose (Sun Jan 24, 2016 8:23 am)
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PostPosted: Sat Jan 23, 2016 11:31 pm 
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I love guys that live outside of the box. Nice work Todd.

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These users thanked the author Terence Kennedy for the post: Todd Rose (Sun Jan 24, 2016 8:23 am)
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PostPosted: Sun Jan 24, 2016 4:53 am 
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Congrats, another beautiful guitar from you.

Sent fra min SM-G920F via Tapatalk

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These users thanked the author Arnt Rian for the post: Todd Rose (Sun Jan 24, 2016 8:23 am)
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PostPosted: Sun Jan 24, 2016 11:30 am 
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You knocked it out of the park on that one, Todd! Beautiful and skilled results!

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These users thanked the author WaddyThomson for the post: Todd Rose (Sun Jan 24, 2016 11:36 am)
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PostPosted: Sun Jan 24, 2016 11:49 am 
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Very much appreciating all these comments, everyone!

One little comment of my own: if it had been up to me, I would have put gold Schaller (or Schaller-style Gotoh) mini tuners with ebony knobs on the guitar, and gold strap buttons, too. But Dan (my friend and customer) wanted these chrome Grover tuners (with black plastic knobs) on it -- he provided them -- and chrome strap buttons to match. They look fine, and the Grover tuners do turn with an impressive buttery smoothness, but I would have preferred the look of gold hardware -- would have complimented the warm wood colors better, IMO.

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PostPosted: Sun Jan 24, 2016 7:08 pm 
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Yeah, but you have such good taste, Todd! :D

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PostPosted: Mon Jan 25, 2016 12:10 am 
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That's a very cool and beautiful guitar. The build thread over on the AGF is one of the best I've seen for its extensive details and great photos. The guitar has many interesting design/engineering features and the methods you used give me a lot to think about.

The neck joint reminds me of the adjustable cantilevered neck on a 1951 National archtop I used to have. It also used a three-screw tripod adjustment mechanism and a single bolt to hold the neck on. The biggest difference was that it had no heel at all. Just a cover plate over the adjustment mechanism. It looked like this:


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