Re-grads..
Arnold, I also wanted to make it clear that Backs can also be too thick (or too thin) and need alteration as well. Mainly on Roundbacks from what I have seen. On a few Flatbacks I checked recently I have learned they they too are graduated in some way with the thicknesses not being uniform throughout.
One some of my Flatbacks the Hart seems to be thicker where it is wider getting slightly thicker from top to bottom. My Mystery Bass had numbers all over the place but this may not be all original as it has signs of at least 3 sets or crossbars over its long life and alterations could have been made at any time.
Density of the wood as well as grain direction are also factors to weigh in with regardless of it being a Back or a Top.
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