The last one I built went together easy & worked great, until I did a burn out in reverse. Don't do that. This one, is not cooperating. Now I've finally got everything together, it seems to be in 2nd gear, no matter where I move the synchro. If I move the 1st/rev slider out of N, it locks up. Seems to be in 2 gears at the same time. If I leave the 2/3 synchro in N, it looks like it's in 2nd gear. The output shaft turns. If I slide it into 3rd, it doesn't change. Still 2nd. Slide it into 2nd & it's in 2nd. For some info: 18 series case, '40-'48 gear set. WTF?