I've also designed a set of spur gears for the revised Mechanism. The real work was done using the fantastic program Gearotic Motion. I was originally planning to machine these with the Roland mill, but I am going to use these to put the Form 2 to the test today. Any significant distortion will cause problems with these small gear of 9mm and 14mm diameter. If they don't work I can always make them on the Roland. If they do work, I may need to cast them in a softer plastic. We'll see.
Bruce Wilson proposed a set up from Hollywood Foundry that looks very good--I may go ahead and make one of my mechanisms, and order a Hollywood Foundry item for the second, just to make the body adaptable to something that is not as custom as my solution.