Hi Tom, welcome to the site. Sorry to hear you lost your grandad, but congratulations on your inheritance! Those pictures all look like the same machine, or do you have two identical? I think that the box of tricks is probably some kind of indexing head or rotary axis. As has been suggested mac3 is probably favourite and it would be best to use modern drives and possibly stepper motors. If you post on here exactly what you have you will get plenty of food for thought. good luck. G.