I also would be interested in running a Cheetah; I have a Carrera ‘aluminum/chrome’ version. With the OEM chassis it responds well to a 21.5 Slot.IT. The front wheels are independents; but the OEM size makes it a challenge to clear the tires off the track; Plus there is not much room in the chassis to sub with a wider (but smaller diameter) alloy Slot.IT wheel. So – I replaced mine with independent wheels from another Carrera with a smaller diameter.
The body is thick in places, and the chassis is very tight on the inside (limited spots to out ballast). If the Cheetah is allowed I would also prefer that a 3D chassis be allowed for Carrera. MRRC and other brands with challenging chassis.
"... get on your bad motor scooter and ride!"
Sammy with Montrose