Tranny Gears and Shafts in Place

Got tranny in.. quite a puzzle to do but everytime i do one it goes quicker, it does not seem to work how they do it in the book. They put entire transmission in their left hand and simply push it in and turn it to the right. I install complete layshaft in with shifting fork on, then put mainshaft gears and their forks into detent, install mainshaft and fork shaft. I have to clean inner cover along with the kicker gears to finish transmission.