I'm using a Planet-CNC Mk2/4 for mine, but keeping the original driver board, so the Mk2/4 is only really providing step/dir information to the drivers. Homing is done by NPN proximity switches in the slides, which are quite easy to interface, and my spindle motor is being driven through an inverter which takes two enable signals, one for each direction, and a 0-10v speed signal. I hope to have it up and running by the end of next week.

The manuals state it is capable of machining steel (EN1A) and it looks robust enough. I'm only planning on using brass and aluminium though, so it's not a concern for me.

I emailed cncdoctor when the machine arrived, but received no answer. Looking through the web archives, the website hasn't changed in ages, so I doubt they're still in business.

If you use Eding on the mill, I would have though using it on the lathe as well would make sense, as you'll have a shorter learning curve.

Adrian.