This is another brain fart... Making it up as I go, but in the end things will come together.
I alrerady made the feet, this is the next part that allows height adjustment.
A Rampa nut goes in the middle part inside the conduit and a pied of M6 Wire will be able to push the rig a bit to get that level "thingy"
At the bottom of your CNC you need more stuff... As I said making it up as I go...
This part needs some sanding. I used an old cut up belt. It takes some time, but then you have a tight fit for sure. I marked the tube and used a long piece of wood to drive it in tha last 2 cm.