I'm replacing the original Nema34 steppers on my 1980 Fehlmann Picomax 50 cnc. I was thinking about Leadshine "hybrid servos", but came across JMC closed loops steppers on eBay - CNC Hybrid Closed loop Stepper Servo 2HSS86 Driver + 4.5N.M Servo Motor +Encoder | eBay

Anyone had any experience?

I'd be interested to know if there are any true servos that might be suitable - the old steppers had 3.3NM holding torque. The ClearPath motors look excellent, but shipping from the US to GB is a pain.