
This is a single unit with a captured tail actuator slider. Just fish the ribbon back through the tail and snap the button into the slider and you're ready to flex it.

I printed this model in PET-G and for a fast print I used a 0.4mm nozzle and the draft 0.3mm layer height (prints in about 35 minutes).
I didn't use any supports and it printed out fine. if the slider doesn't have enough bed adhesion, then you can fill the bottom of the slider in with a thin layer of plastic. I had left it open to provide better grip when actuating the tail.
Now you can slide the actuator and the tail will flex. Watch that it doesn't sting you :)
Sized to fit on both the Mk3 and the smaller Mini (although you may need to rotate the model to print at a diagonal)
I have included the step file in case you wish to add leg articulation or some better contouring
Enjoy!
The author marked this model as their own original creation.