Hello John.

Sincere apologies for the delay; the notification of your message ended up in my junk folder. Not too handy!

I believe the screws are stock Myford items so not likely a ballscrew. The main leadscrew is a square form thread as you would expect.

The machines are in Arbroath, East Scotland. Are you in the area? Viewing is welcome if so. Thanks.

Regards, Duncan.