I injured the tip of my finger a while back, so I printed this to protect the tip from getting hurt further during a work team building obstacle course.

The tip is a solid dome that shouldn't touch the fingertip, and it is held in place by clamping onto the finger lower down. You'll need a countersunk M3 bolt and nut to tighten the clamp.

Fusion 360 file included if you'd like to customize it for your finger. Drop a comment if you'd like me to tweak it to fit you - happy to make it a customizable thing as well if it will help someone.