Filament Clip - closed version remix - Stronger and removed overhangs

I added a 45 degree sloped wall to increase thickness and increased thickness overall for durability. I noticed that the filament holder broke where the filament clips after a few cycles of clipping in and out. I replaced the circular hole with a larger square hole for easier print. Printability of the hole was an issue due to bridging. It would sometimes get too tight and prevent me from inserting the filament or the filament just wouldn't slide through freely from too much friction.