I'm looking to pick up an X axis power drive for my Bridgeport. How the old one was accidentally wired to 220 volts and burned up the controller card will NOT be discussed..! I had a Servo model 100, and am looking for a replacement comparable to a Servo 140-150. What is the quality of the units on the market today? I see pricing from 350$ all the way up to 900$ or so. I'm a hobbyist, and don't need something that will last for the next 30 years, just be reasonable quality at a reasonable price. Prefer a used Servo, but would entertain an Asian knock-off..