I'd ask Hornseeker but haven't seen him around here for awhile. 
I have an older take down long bow that is unmarked, but probably a little over 50 lbs @ 28in. I'd like to make it 30-35 lb. Is this possible by slowly planing a bit of material from each edge and creeping up on that weight range?
It is laminated w/ glass. 
If so, any precautions or tips??  Thanks