I have contemplating this topic also but along the lines of doing a 3D printed revolver. But this is still very much incomplete and I am still pretty much a beginner when it comes to OpenSCAD and 3D printing. I also don’t have the best track record of getting microscopes actually finished…
This would need to go onto a upright Delta - which does not even exist yet IIRC - or a upright with a strong enough z-axis to carry the whole head or - may be more feasible - an upright where the whole stage is on a Z-Axis.
I just yesterday did some test prints so see whether ball bearing races can be printed upside down without support which would be needed here. So for this looks promising. Although I only had 8mm balls which are pretty bulky and the final version probably needs something more like 4mm balls.
I will probably try to get my laser cut microscopes working first so it is easy to add the bulk needed to fit such a large optics assembly. The high resolution optic module also just barely has enough space between the objective thread and the tube lens to cut it into two pieces. So I might want to change the distances there to make this a bit more comfortable. But my optics foo is still not quite up to that.
I also still have a laser cut version of a revolver/rocking arc in the back of my mind but it has not yet solidified into an actual design.