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!
The author marked this model as their own original creation.