[gpetilli]

We made the switch to VEX this year (including the new clamp on gearbox). Just a warning that it is not so easy to mix and match the chassis parts.

The VEX C-Channel is 1" OD and the AM is 1" ID (1.25" OD), which means the Vex will slide into the AM (good) but you can not use the extruded corner connectors from AM on the VEX (bad). The VEX system assumes external gussets (with rivets) to constrain the corners.