Jason, thanks for the reply. The original Drummond design of travelling steady was designed to be bolted to the back of the saddle and had a large slot to allow the cross slide to pass through it, as you may know. I hadn’t thought about turning the top slide through 90 degrees though, I might try that.
The picture was posed, I have been using plenty of cutting fluid.
Hi Bernard, I have done that when cutting standard threads but not sure about ACME threads. Might try that if all else fails.
Thanks, John.