Yes, I'll be backing with bamboo. The local source is running low on knot free sap wood 4/4. I can get 1/2" BUT the price structure changes. As 4/4 I pay per board foot, rip of a 1/4" and have a piece just over 5/8" and the 1/4". Then I can save the thin slices and glue several togeather in a deeper form. Else I just get the one belly for about the same money.