I see that one has power feed, and I have been thinking of adding that. Would like to see better detail of that power feed.
If that is still on your someday-maybe list, pull up the online US Army contract manual on the Burke #4 / B-100-4.
Nearly identical rig.
All of mine was missing but the step-pulleys, which being ZAMAK I traded to another member who had the rest of the bits for his one.
What is sitting idle is $70 worth of NOS Bison 90 VDC hollow-shaft gearmotor instead. And a KB-Penta drive to run it off 120 or 240 VAC. Remotor for the spindle is DC also.
The missing telescoping tube and U-joints, I figured for nested square tube and stock socket-wrench U-joints. Grob spline goods I have used my share of, but seems $ overkill, here.
I DO have Burke's OEM bronze worm-wheel just inboard of the right-end crank-handle.
The MO was for the Operator to lift the worm-on-shaft with a handle and knob into a gated notch in the cover and latch it there.
The stops, front edge of the one Tee-slot table - then kicked it out of engagement - or the operator did. Gravity dropped it clear to the cover's lower end of the slot.
Crude, but all it needed, short as the table travel was.
The only hard part is finding a worm to match my existing wheel. Or in your case, adapting a set.
I've even sniffed at repair parts for BirdPort head movement and garage-door openers, but "other priorities".
And a larger mill.., etc.