I use several machines in my shop. As far as Consew, my 206's are vintage RB-1 and RB-2. I also use older Consew 227R and 227 cylinder beds.
For heavier harness I had been using a Singer 7-34 and a Singer 45K, but lately I've been using a Cobra Class 4. Night and day difference.
I often switch out old clutch motors for new servos because they are cheap, run quiet, are more energy efficient, and provide more control and consistent torque.
Best,
Chris Hughes