10-Metre Motorized Target Carrier

I’m putting together a 10-metre air-pistol practice lane and need a complete, electrically driven target carrier built around a 12 V DC geared motor. The carriage must travel the full ten metres on a low-friction plastic rail or guide, ride smoothly on a sturdy steel trolley, and return at the flick of a simple manual forward/reverse switch mounted on my shooting bench.

Here’s what I expect the finished system to include and accomplish:
• Rail/guide: straight, 10 m length, durable plastic that can be fixed to my existing wall or ceiling framework.
• Trolley: rigid steel frame sized to hold standard pistol targets, running freely on the rail with minimal play.
• Drive: 12 V DC geared motor sized for reliable starts, stops, and steady travel speed; rope or Kevlar cord looped over two end pulleys to move the trolley.
• Control: panel-mounted manual switch for forward and reverse plus integrated limit switches at both ends so the carriage stops automatically without crashing.
• All brackets, pulleys, end stops, wiring, and hardware necessary for an easy install—ideally a plug-and-play kit I can mount and connect to my 12 V supply.

I’ll look for a concise wiring diagram, a parts list with specifications, and clear assembly instructions (photos or a short video welcome) so I can build or commission the setup locally if needed. If anything in the design needs fine-tuning for safety or smoother operation, bring your ideas; accuracy and repeatability matter more than speed.