Hornby Ringfield Conversion Adapter

This adaptor is designed to make the process of converting an old Hornby ringfield motor easy, and most importantly reversible as no adhesive is required, meaning there is less likelihood of ruining the model during conversion and the motor can be fully replaced if necessary. The adaptor is a very tight fit, so should not require any adhesive to keep either it or the motor in place. If you find that the motor is a loose fit, I have added 2 small screw holes that can be used to secure it using the threaded screw holes on the motor.
I would recommend using diodes to drop the voltage supplied to the motor from 12v to 10v, more detail on how to do this can be seen in this video:
https://www.youtube.com/watch?v=jnY0nCt7sOU

I have tested this on a Hornby HST, but it may not fit on other ringfield designs. The duct tape pictured is being used as electrical tape, not to hold the adaptor in place.

Pros of the conversion:
Faster
Better low speed performance
Less noisy
Does not give