Have done this for a few guys bows. If you can't save the core, you can save the boo and re taper sand it for another build. Just saw the boo off and make sure you stay in the ERC and then sand it clean on a 48-60" belt sander.
You put thick boo on a wood that is weak in compression and the boo will over power it in a heart beat. You can limit the impact by sanding it thinner where the bow does the most bending. I like to put a thin hickory tapered core lam into my boo backed bows with osage and the like. I stay away from board store lumber. If I want to start with a board I take a stave with correct orientation and make into a board out of wood I know that has been cared for to make a bow out of. Seems to work for me but I dont make a lot of backed bows.
HH~!
