After playing with Kobayashi cube on one party I had to model one.

You have to assemble this one and it needs supports on build plate only which are easily removable. 

Connector1 and Connector2 shaft and hole are same dimension. I have made hole bigger by adding XY Size Compensation: -0.06mm inside of a PrusaSlicer, that way the model can be enlarged and printed in any scale.

There is 3mf file with all the parameters used.