Randy, and I mean this with sincere curiosity, did you do or find any market research on the possible popularity of this feature?
I do market research every time I read our customers' emails, evaluate our products sell through rates, and visit these forums. I also look at my own needs for machines I own, look at what is currently available to fill them, sometimes shake my head a few times when I see what is being offered, and start spending money on prototype parts to make my visions a reality. Keep in mind also that sometimes markets don't exist until someone breaks away from the current way of thinking and moves things in a new direction. Had I based everything I developed on existing market demand, there would have been no interface based electronic joystick restriction, high resolution button-hole mounted spinners, High resolution RGB trackballs, RGB lighted pushbuttons and their associated controllers, etc. This design isn't quite so revolutionary, but it is useful and I believe it will make some folks very happy, either on it's own, or as has been mentioned here, as a base for an automated switcher or other "non-below panel" switching mechanism. I also don't care if a new design flies off the shelf like gangbusters. I'm in it for the "long haul", so if I can help a small percentage of the community (keeping in mind that it is always growing) with a new design, then I will be happy. After 9 years of doing this, I think it's pretty reasonable approach that benefits everyone.

I wouldn't think R & D would be all that much, you would just need some minor adjustment to the joystick's mounting plate to mount an off the shelf servo with a cog that fits nicely against the cog like edge on the current restrictor.
I don''t think the cog idea would work well. There is no center to rotate about, so all the force would be on the side of the screw. This would equal binding and burnt servos. But the handle on this design offers a lot of possibilities. I have a box full of servos (who said it wouldn't cost much for R&D

) so when my laser gets set back up, I'll be looking at this again. Longevity and safety are my biggest concern with regard to servo use. Had I not seen one melt into a blob, I would probably be a little more "gung-ho" on the idea. To the folks who have used servos: What have your maintenance requirements been like? Has it been trouble free, or something that needs tinkering? Or have you scrapped the idea and gone back to something more reliable? I see a few have done it, but so far, not too many updates on the project 6 months after reasonable usage.
RandyT