Yo!
Did you get the crank arm off yet? On my last crankset that I took off the threads were too damaged to even thread the crank puller on. The mechanic at the LBS gave me what he called a "pickle tool" (probable not the correct name?). It was a wedge-shaped tool that slipped over both sides of the spindle in between the crank and bb. I gave the top a few solid whacks with a hammer, and VOILA! the crank arm came off. Don't know if this method would worry you about ruining your bb tho. Thats why I run the standard Shimano $20 bb, and mines still fine.