As I now have a lot of Spy Hunter boards to fix I thought it best to hack together some kind of test box.
I now have an Absolute Position PCB so the rest is just wiring.
Here is the finished product.

Ive tested this today on a board set and it works very well. The only think left to add to my Spy Hunter test rig is Cheap Squeak support.
That will probably be added once all these boards have been repaired though.