[asid61]

Nice drivetrain! Very clean, looks good. A few questions, if you don't mind:
1. What is the weight with what is shown in the picture?
2. What size wheels are those? Are they custom or COTS? Tread?
3. What is the thickness of the 2x1 and the bellypan?
4. How are you planning on tensioning?
5. Are those gearboxes mounted directly to the 2x1 or via standoffs? If it's the latter, change it to the former.

A small recommendation: Make sure the gearboxes shown have the same mounting hole pattern as either the Vex or WCP gearboxes, just in case. Or both even.