Maybe this is a double post but to all that didn't read it or are interested in this just a small tip.
To any one who is tired removing the top deck when changing the spurgear this is a solution for the 416,416WE and 416X
The 3 racing part 416-02/LB replaces the motormount and the centre pulley axle post on the right side of the chassis.
For the 416 and 416WE there arn't any mod's needed.
For the 416X you need to remove a small amount of the rear side of the motormount(diffside) and the centre pulley post.
Sad part about this is that you can only use 2 holes on the motormount for your topdeck
It allows you to quickly change spurgears without removing the top deck tho.
If you don't want to do the mod on the motormount and center pulley stay you can only use the gear adaptor.
You do need to make a small spacer where you 840 bearing is tho.