Remote Controlled LEGO Technic 8457 Power Puller.
Completely stock but only with the addition of 1 I.R.-receiver V2 and 3 9V-covert cables.
I only had to customize 1 9V-convert cable to power the I.R.-receiver V2.

Thnx 2 this guy:

   • Lego 9v to IR receiver adapter