Model Diesel Engine Starter Mk 4,.Tester wanted

Although the 3D Print says Mk.3 it is Mk.4

Uses a clockwork type spring to wind up and start a
Model Diesel Engine

A tester is wanted, (UK please), to test with some real Model Diesel Engines and provide feedback.

I am looking for a YouTube Real Model Diesel Engine Starter tester, not glow plug, as I do not have the budget to buy one for testing.

Contact me on YouTube if you have a YouTube channel to video a real life test using at least one Model Diesel Engine.

This has mainly been made using a 3D printer.

Only One available for testing

https://www.printables.com/model/302259-model-diesel-engine-starter-mk4-i