Yes, sdsollod - that is what I do.
Todd, the brace I use isn't curved for the majority of it's length and thus acts very differently than a brace that is curved along its entire length. And I would absolutely agree with you - a curved UTB would not be a good idea since the design wouldn't resist rotation. Since this seems to be causing so much confusion, I added a picture of my bracing --- as you can see, this brace might actually be more resistant to twisting than a regular brace. If you imagine what happens as the brace would rotate towards the soundhole, the area beneath the cutaway would have to dip significantly lower than the other side of the brace. In some ways, this could cause splitting but the x-brace is right in that region and the florentine structure is very rigid right at that point and so, I personally do not view that area as being susceptible to much twisting (I also use double sides). -- so when designing bracing it is always important to look at the whole picture.
In the grand scheme, there are many designs that work well - this is just how I chose to address the supporting the upper bout with a cutaway.
