I feel kind of lost since this is the moment when I start thinking of the actual details that turns an idea into something that would actually work, but I'm currently modelling the Z Slider. I'm doing a bit of a "Merge/Insertion Sort" like approach when it comes to housekeeping.

I'm using a 12 sided polygon as the clamp interface between the Y axis tube and the Z axis slider. This gives some tolerance in the design.

I originally thought of having the clamps oriented the opposite way, but I'm thinking that the design can get a higher space utilisation this way.