Hello Alan.
I am not good at discribing things!
The tool post fit on cross slide that in turn fits to the main slide to turn the diameter of the part ..the handle to turn part is at the front of this slide.
The handle lead screw that goes though and has brass nut that give movment to the main cutting slide.
I need photo of the back end where the nut is fastened to the saddle
We may get there!! but at least it's warmer here than down my workshop!
Thanks for your efforts.
Dave