The countershaft (closed end) bearing boss of my KHK cases was cracked and oval. The bearing just falls out. Someone had tried to peen it in - it's just freaked up. McFarland spun out an inner aluminum sleeve for the ID - and he made an aluminum "donut" for the outside. Pat will weld all this up - creating a strong boss for the bearing. With both case 1/2s together, with the trans door installed - McFarland will locate off the door bearing ID - and then remove the left case 1/2 - and using this dimension, line bore the closed bearing ID - to leave about a .0025 press fit for my new closed-end bearing. Understand? I do, but I've been running this through my head for about 10 days now . . . brain strain !