I did a chassis mod on the TLR 22-4 to get more air in to cool down the motor.

It would be nice if you could post this pictures, because I am sure of that other 22-4 driver would be interested in a cool down solution when driving on high grip astro, without bying the shorty chassis.

The mod does not affect the stiffness of the chassis and the motor-temp drops approximately 10 degrees Celsius.