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I have been running your original filament holder since Christmas and it is working great!
I am almost ready to print another one, as I tried using a roll of Inland glow in the dark ABS which turned out to be very abrasive!
It wore a deep groove in the filament guide on your holder and the feed plate on the back of the printer. it also ended up causing some really bad nozzle clogs.

The only suggestion I would make is to modify your filament guide to the hole. Make the radius on the lip larger so the filament has a gentler 90° turn into the hole and better support for filament to reduce wear.

so far it has been great and I did not have to reinvent the wheel. Thank you!