Jeff,
I disagree with your analysis; however, I am not really interested in getting into a debate about it. Let's just agree to disagree.
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Charlie,
The "t-brace" is physically similar to a a tall, narrow triangular brace. The base of the "t-brace" is very small in height and the overall brace will be extremely light. The purpose of the base is to provide an adequate gluing surface rather than give the brace strength. You can achieve identical results by profiling with a narrow, triangular brace. In real world terms, I believe a t-brace will be as strong as its triangular analog. I believe that you can go slightly lighter with a very tall, narrow triangular brace but not by much. However, I can't tell you how many braced tops I see on the OLF that could be made much lighter by profiling the braces narrower and not losing any strength. That doesn't necessarily mean lighter is better -- but I am definitely going for light and strong bracing on my guitars. As I mentioned before, one of the biggest advantages I see with T-bracing is consistency. I believe this is very important for early builders as it helps keeps the bracing cross-profile similar from guitar to guitar. Here is a photo of one of my tops with the t-brace. And yes, the credit for t-bracing goes to Gilbert.
