Hatchbox 1.75 mm filament spool clips

There is a set of clips online already, but they are small, curved, and don't hold that well. Worse, I've lately been having problems printing new ones (after the initial layer, the next few layers don't print well, partially due to the amount of printhead movement, stops & starts, retractions, etc.) I designed a new one with the most important design criteria being that the entire print is interior/exterior walls (no infilling needed after drawing walls). I used a caliper to measure an empty