RC toy for R2D2

My R2 unit is turning out better than expected. It is lightweight.

Has anyone used a toy RC car to power an R2 unit?
is it full-size? I'm planning to build one full-size soon, but I'm going to use electric scooter motors. I think an R/C car motor would be too noisy, whereas small scooter motors are very quiet, and more screen accurate in that sense. Something to think about.
 
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