You could probably make it out of the existing vehicle system. Except you start off with a special RC car rig, which only accepts special parts which all stack on the same tile. That way you can have it handle like a normal vehicle and have it run on electricity or petrol, depending on the engine used, and also maybe add specialist bits to it such as a camera that lets you follow it around, range boosters that let you control it further away, and other bits you might want.
If you made it simply be very light it would already have most of the limits of RC cars, it wouldn’t be able to run things over or go over obstacles.
I was looking at the github tracker and I noticed something called a folded bicycle? Which I guess means you can make vehicles you can pack into items? In which case that would be ideal for an RC car too.
