Hi Morrie, Welcome to the world of CNC.I have been playing with CNC for a few years now and also Casting. The small router you bought sounds interesting. Particularly the 4th axis. I would suggest that you could have success making small gears in plastic but you will be pushing the boundry to expect a router to cut metal gears depending on how fast and how accurate you want them. Mach has some canned cycles for gear cutting that work quite well, (Conversational) I do lost foam casting of Ali and bronze. If I can help let me know. As for the Group I would think it will be revived in the new year. For now watch this space.
WJF
The More I Learn The Less I Seem To Know