Well, I am waiting on the two shafts to arrive before I can try my design.
I decided to use the Igus plastic bushing I already have, because dust will not affect them, and use M5 brass inserts to secure the clamps.
The renders are missing the floating clamp that will be adjusted at the top, much like what is seen in your video.
Currently, the body clamps are set to be 20mm in height, probably overkill, but only when will it be printed will I decide to change it or not. Most likely, I'll end up having them at 16mm of height.
Still haven't decided on bristle for the shoe, or clear PVC...