Rope aglets; multiple sizes, strong and printable

I made these for a project and went too far as always. The sldprt is uploaded and the parametric aspects mostly work. There's a breakdown in anything over 8mm currently. I've uploaded 4mm to 8mm increments.

This is designed to be printable with external support only unless you use a massive nozzle.  (Then you need trees to reach the internal lip)

Please note, the parts are sized by the ID of the part NOT the rope.

Print them on the flat nose for best results, please.

This is a work in progress.

Kown issues:

• opening too large (catches when untying)
• too thick (strong, but means forming a larger bite/loop to put the aglets through)
• 8mm and up get very thin at the front