Just took apart one of my 121/122’s in search of said grease, but there isn’t any to remove.   I’m very impressed with the gear chain, the shaft drives both bogies. With a start up draw of 0.4amps @12v = .48w it’s actually quite power hungry, after a few minutes it drops to about 0.3amps but it’s still rumbling along.   I have 3 of these all performing pretty much equally.   It’s easy to see its free running, but thick grease on the gears isn’t the issue. I’ve just experimented dro