Wheelchair Rack for Scooter

I need a metal rack designed to securely hold a manual wheelchair on the back of a scooter. The rack should be made of aluminum and can be mounted using a bolt-on frame quick release system, allowing for easy attachment and detachment of the wheelchair without removing its wheels.

Requirements:
- Designed for a manual wheelchair
- Aluminum construction
- Bolt-on frame quick release mounting system

Ideal Skills and Experience:
- Experience with metal fabrication, especially aluminum
- Familiarity with designing secure, durable mounting systems
- Prior work with mobility aids or similar projects is a plus

Please provide samples of relevant work and ensure the design is robust and user-friendly.