pic: VersaDrop GrassHopper Drive

[LCJ]

Originally Posted by Jack S.

1) If you're planning to run the chain inside the tube between the gearbox and the drop module, you may want to consider how your gusset for the cross rail attaches to your side rails. (looking at you KohKohPuffs )

I completely forgot about the rivets.
Your suggestion sounds pretty good (with using angle gussets) but I also like the method you used on the 624 off-season drive with a block inside the channel. I might be able to do something similar here with blocks only in the middle channel, and bolting into them from the side channels.

Originally Posted by Chak

Is there a reason to use the 2 CIM single speed double reduction gearbox when you only have 1 CIM? It looks like a Single Reduction Clamping Gearbox would work just as well, in addition to being smaller, lighter, and simpler (slightly more efficient because less stages! ).

The main reasoning behind using the double reduction gearbox was because the height of the wheel using a clamping gearbox was way too high to get enough traction going. The current design has a 1/8" drop and to get it there, I had to use a gearbox with an output shaft that could be mounted anywhere. The reason I used the particular gearbox was because I liked the long output shaft (compared to VersaPlanetaries) and it was also one of the cheaper options from Vex. The reduction options were nice too (for when I inevitably screw up ).