[chrisguyw]

Hello Bowley,..........I have replaced many "longcan" motors in the Scaleauto RT3 (and other)  anglewinder pods with "S" can motors, and, there is no need to use any sort of adapter. I have done this for club members, customers, and several proxy cars (proxy winners),...with zero issues whatsoever. 

Use machine screws through the pod bulkhead and into the can,.....if you are concerned (no need to be) you can use a drop of shoegoo etc. on the endbell end where it touches
 the edges of the pod cradle.

Since the mid 60's, motors (much more powerful than those used in our current plastic toy cars) have been secured to the chassis using screws or soldering,  securing only the can end of the motor to the motor bracket/bulkhead.

Cheers
Chris Walker