05/24/2024 UPDATE v2:

I've made the shoes wider and a better fit on the rubber foot bottom hole.

The feet I used to build my Rook MK1 are here (not affiliated).

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My small Rook MK1 is pretty lightweight so it would shake a lot and walk around while printing. High speeds and high accelerations were really difficult to manage.

So I bought a 40x40 cm slab of concrete for a couple of bucks and designed shoes that fit perfectly into the feet and can be glued to concrete with epoxy.

Problem solved!