I made a ridiculous tiny hackberry that I cracked in three places forcing too much reflex in during heat treating. I ended up filling with CA glue and tillering it anyway.
It ended up flat after shooting in, and the tension fractures on the belly did not seem to have any real impact on the performance of the bow. It has been fired around a thousand times now and is going strong, although I know now to be more gentle with my application of force until a larger part of the limb is warm.