I have 2 excellent ideas for an automated tool changer for my PCB milling platform in combination with a Dremel flex-shaft in my adapted milling toolhead
and for a complete toolhead-changer (e.g. 3d printing to milling to plotting) for the RepMan that may or may not be adaptable to the much tighter Thing-o-Matic.
I plan to check out these ideas on GulaschProgrammierNacht this long weekend.
So stay tuned...