so here is the update on the all wood test bow.... it finally broke... i drew it to 38" (with my feet and a stick!) held up to it... so i decided to unstring it, being there is not fiberglass to prevent string follow, the bow stinger was not with in reach so i just bent it by hand a bit popped the string off then bent it just a tiny bit backwards to get the loop over the tip, POP! the only thing holding on the last 18 inches of the lower limb was the backing. i don't know if it oak was just that week in tensel strength or if it got crushed drawing to 38" maybe a bit of both. anyways it served its purpose, i am going to make a all wood test bow off the kids form i cut tonight, i will update these results once i have a 36" all wood to play with.