Forgot, guess I did install a servo a while back, way back! I had forgotten about it because it died on me fairly quickly so I haven't been to keen on servo type motors since. The machine I had it on I no longer own, my first walking foot machine. But that was when servo motors first came out and it sounds like they are being made better now, so I'm ready to try another.
My main machine that I use these days is an older Pfaff 545 with large bobbin, made about 1979. A fantastic machine in like new condition, it's a monster! I like the motor that is on it, but it's an old clutch type and goes like the wind. I'd like to put a servo on it to slow it down when sewing finer detail stuff. What I sew with that old Pfaff is mostly thick canvas/tarp, banner material, and sunbrella. With a servo motor, I would use it for leather clothing items and handbags.