Then You don't know about slip fit bearings on the spool or the numbering system on pinions. Back lash is just a matter of moving shims from side to side none added or taken away. Pinions are marked for depth to center of spool, just add or subtract( if more than .002)from the one that's initially set up. The pinion already has the big bearing on it. I have both the miller tool sets(given to me when my uncle sold the dealership), I don't use them after the first setup, just check pattern with white lead(Stijl got a can). It's certainly not rocket science. Setting up the first time could take two hours or more depending on the parts used.