Splatmaster z200 safety pin

The safety pins on the Splatmaster Z200 are quite sensitive to breakage on the safe side.

This thing is intended as a drop-in replacement. I've tried ABS and PLA. PLA gives the best functioning part, as the friction is lower.

You'll need to add o-rings, so the pin keeps its position.

- For the hot side: od=7mm, id=4mm, thickness=1.5mm
- for the safe side: od=6mm; id=3mm, thickness=1.5mm

I found that the part works fine without the o-rings as well, so I also added versions without th