Rebuilt the slipper with the mod 1 46t spur. Using a 13t pinion which doesn't leave much clearance at all between the motor mount and the slipper output. Gearing gives about 73km\hr which is close to what i had with the mod 0.8 setup. Definitely can't go to a smaller pinion without changing the motor mount.
Enlarged the cutout in the diff mount to accomodate the adjustment ring. Also thought i would try a cutout in the skid plate.
Schemed up a method to weigh it. Used my 2kg scale under each wheel with supports the same height as the scale under the other wheels. Weighed it with stock wheels and everything except battery and body. Total weight was 4922gms. I know the stock wheels are usually a touch over 300gms each so without wheels its about 3722gms. This seems about right compared to Nard's weigh in
here as it doesnt use a gearbox like the FLM tranny forward.