Motorized 10 m Target Carrier

I’m setting up an indoor air-pistol lane and need a complete design for a 10-metre electrically driven target carrier. The concept is simple: a steel rail or guide runs the full distance, a small trolley rides on it, and a 12 V DC geared motor moves the trolley back and forth via rope over two end pulleys.

Here is what I already know I want:
• Steel rail/guide for stiffness and long-term alignment.
• 12 V DC geared motor powered from a plug-in AC-to-DC adapter (no batteries or solar).
• Wired hand-held remote that gives smooth forward / reverse control.
• Limit-switch stops at each end so the carriage can’t over-run.

What I need from you:
1. Mechanical drawings and BOM that can be taken straight to a metal shop.
2. Motor sizing, pulley specs, and rope choice that will give reliable starts/stops with a 1–2 kg paper-target load.
3. Simple electrical schematic: motor wiring, DPDT (or equivalent) momentary switch for direction, limit switches, adapter spec, fuse.
4. Assembly instructions and any alignment tips so I can put it together with basic tools.
5. Optional: a brief parts-sourcing list with readily available components in EU or US markets.

Deliverables will be accepted once drawings open cleanly in PDF/DXF, the wiring diagram is unambiguous, and all parts are identified with supplier or spec equivalents. If you can include 3-D CAD (SolidWorks, Fusion 360, etc.) that’s a bonus but not mandatory.

If something in the brief looks unclear, let’s talk before you start—getting the dimensioning right the first time is key.