Just curious, what style of crank puller are you using? I have a couple — one is a the Park CCP-22 that has the handle attached to the inner threaded pulling mechanism. The other is similar to the Park CWP-7 (but isn’t actually a Park tool) which DOESN’T have a handle attached to it, and requires use of an open end wrench to turn the inner mechanism. On this one, both the outer part threaded into the cranks AND the inner part turned to force the crank off the spindle have an external hex fitting for using a wrench. On more than one occasion, I have found myself not paying attention, and cranking down on the outer part wondering why the damn crank won’t come off…then feeling lucky that I didn’t just strip the threads from the crank. I mean it’s a boneheaded move on my part, and you’re probably (hopefully) not doing this. — Dan