I am assembling my IO 360 and have a question about the Lycoming procedures. My crank was worked by Aircraft Specialties and my case was worked by Divco. The crank was turned down M006 for the main journals and M003 for the rod journals. I mic'd the crank journals and they are right on the numbers for M006 and M003. I bought the correct M003 and M006 Lycoming bearing sets. The Lycoming manual directs you to install the bearings in the case without the crank installed and close up the case to be able to mic the final ID of the bearings and then disassemble the case again. Is this really necessary? I noticed that other IO-360 assembly manuals (Superior XP for example) do not direct this step...it has you move straight to installing the bearings and crank. Thoughts? I understand clearance is important, but coming from a reputable shop like Divco and having brand new bearings it seems overkill. Thanks.