help needed with 904

I'm watching too. I've built somewhere between maybe a dozen or two TFs ., and probably half were kitted. As to the geartrain,they are hard to screw up, unless you forget a part. Or break a cast seal-ring during the front half installation,or don't get all the plates engaged,Or a governor E-clip not properly installed,Or a spring mixed up,Or a ball left out, or or..... Ok I guess they are easy to screw up,but I haven't yet. You've got pictures;which is more than I had with my first one. That was in the 70s.