I have the back of my cornerless bass glued up and rough shaped, with the break already bent. No braces glued on yet - I've been waiting for drier weather. The back is cut from nicely quartersawn wood, and has been stored upright on my bass rack with free air circulation all around However, the whole back seems to want to bend such that the back would be concave if glued on as-is. I can force it to lie flat, and in fact my braces are carved with a slight convex curve in them to force the back to remain slightly convex when glued on. I can make it lie flat by spraying the concave side with water, but left to its own devices it just seems to want to curve the other way, and will return that way when it dries out again. i can't really use it the other way around either, a) cos I have bent the break already and 2) the bass is slightly assymetrical and it won't fit the other way around, even if i cut through the bend and make a butt joint at the top brace. What I'm hoping is that Arnold or Bob have come across this sort of thing before; am I asking for trouble if I glue the braces and force the thing to lie flat or very slightly curved the other way, knowing that in its heart of hearts, the wood wants to be elsewhere? Or do you reckon, it'll be OK.