I've printed a lot of model before coming to this.

If you're looking for The Ultimate Filament Clip well go get it, this one is meant to be Universal: As long as the wire comes back close to itself the clip can grab it. No need to hang on the spool or bullsh!t.

Your spool is almost empty? You'll benefit even more! The Shuttle shaped clip is thought to fit the AMS filament inlet and move onto it like a ball joint. When the spool is ending and the AMS fatigues in pulling it through, the Shuttle Clip forces the wire in an almost 45° angle which gives a significant mechanical advantage to the machine, incurring less likely into feeding troubles!

The hole fits cozy, the clip grips hard: No wire is going to pass too tight and fool your AMS. You'll never have loosen clips and spools that may have got tangled.