I’ve been trying to hunt down parts for my rebuild, which is surprisingly difficult to find good used parts, or even reviews on new manufactured parts. I have lucked up though, there is a used crank for sale just an hour north of me so I believe I will be going to check it out. Now my dilemma, how do I know if this crank is worth anything? What are the specs and tolerances I should be checking for on it? I assume no bearing play, any way to ensure it is true and not out of balance?