Come on Max - Think it through.

Using your Logic:

The flyer says:
Buggy - so does that mean you can run a B4 or maybe your 811e?
F1 - So I can run a F1 with a 3.5T motor?
Stadium Truck - Does that mean Zac can run his RT5 with a 4s and 550 motor.
Sedan - Rick can run is TC6 on Foams?

The rules may not be written - but we all know them.

You get the point.