2-piece Mikrokopter Ext. Compass housing

2-piece Mikrokopter external compass housing for mounting with 25 mm tube-clamp.

Features:
- Direction-arrow
- M3 thread in top-part to secure top to buttom via aluminium screw (non-magnetic)
- M3 thread in lower part to secure to clamp
- Holes for stress-relief zip-tie for the compass communication cables
- Guide-notches to prevent rotation and wrong mounting of top part to lower part

As this Thing features rather tiny screw-threads, be sure to print it using a low layer-height