If you need a golf ball that fits and plays perfectly check out my airless minigolf ball: https://makerworld.com/en/models/250574

I designed a fun way to use your spools in a different way.

All you need is a spool of filament, some sort of stick and a small ball to start your minigolf journey at home :)

The ramp should be universal for every spool (if you need changes for a special kind of spool please feel free to let me know!)

Just measure your stick and pick the right golf club head that fits on it. 

The Insert it not needed but really helps to guide the ball inside the hole and also makes it easier to remove it after your hole-in-one ;)

→ There are currently two sizes available (I only use two different brands atm), if you need a bigger/smaller one please let me know so I can add additional variations :)