Difficult and tedious to print with manual color change in PETG.
A M3 x ~12mm screw is required to fix the end plate.
For a perfect printing result, 7 middle parts should fit on the axle and the stop pins prevent the thing from being stretched too far.
Warning:
I am not 100% satisfied with my test print. (Some quality issues with the bridges.)
Unfortunately, it rattles on high ventilation level. Also it feels a bit too heavy.
I may have to revise the design again.
The author marked this model as their own original creation.