Some switchgear parts have arrived and I've been testing them against the controller.

I've made a small change to the control panel setup in post #21 above. The control I'm using to select the non rapid jog speeds is a 3 position latching rotary knob from Eaton in their M22 series. Part number is M22-WRK3. This has a separate mounting plate that attaches after the actuator is fastened to the front panel and the switch mechanisms (blocks) snap into the mounting plate.

I had interpreted the datasheet to think I could snap in 3 NO blocks to drive the 0.001, 0.01, and 0.1 inputs. I turns out that the actuator only switches the 2 outside positions with the middle position being a "dead/off" position where nothing is switched.

Luckily the blocks are stackable so I've added 2x NC blocks, one on the back of each of the NO block, and wired these NC blocks in series to give a 3 position output. The relevant part of the schematic is now

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