The high cost of good RC truck kits, diminishing need for such kits & the noise of gearboxes made me look elsewhere for a robot platform. 3D printing a truck from scratch, with only a few metal parts still being off the shelf, was the next step. The only parts which have to be outsourced are the motors, steering servo, & steering knuckles. Everything else is 3D printed or home made electronicals. The size was based on the original Tamiya lunchbox.
The remote control is a single paw 3 channel, with 100mW radio, ball point pen springs, hall effect sensors.
The remote control is charged inductively.
Motors are direct drive Propdrive 4248's of any KV rewound with 20 turns of 26AWG. They don't produce enough torque to go up hills. The motor sensor is a dual hall effect sensor resolver.
The main problem is cooling the motors while getting more torque. Metal motor mounts of the right shape continue to be cost prohibitive & PLA doesn't dissipate heat.