Jakobi
Super Moderator
You can test the trans just before dropping on the LH case. It's a pain and doesn't work well as you have to support the shafts and shift drum. Or, just dry fit the LH case with gasket and make sure that the cases seat against each other. NEVER use the bolts to pull the cases together. EVER. If you can not tap the cases together, something is out of place. Last check for dry fit before doing all final install, temporarily install the center case bolts, the ones inside of the stator housing and near the sprocket. Tightening those bolts and spinning the parts will tell you everything you need to know about the case alignment and part interference.
Champion! Thats gold info.