Tucked in back under the lower cabinets.

Kat found a ceiling light bear pull chain to use for the unraveling weight.

There's not enough width between the cabinets to pull the threaded axle sideways to put a new roll on, so I ended up putting a counterbore in the end plate to catch the knob. The other end screws into the other end plate. When screwed in, the knob is captured by the counterbore. A slot allows the axle to drop free downwards when unscrewed.

Two years after "finishing" it, and I'm still working on our tear.
Sam