A Filament Guide

An Improved Filament Guide
I just received my Prusa MK4 and find it a wonderful machine indeed. It is faster and much quieter than my MK3, and produces parts that are beautifully smooth and precises. I use it to print test apparatuses in my laboratory, and small printing ridges can be the difference between a functioning part and not.
I was impressed with the filament guide idea, since a fresh roll of filament occasionally will jump off the reel on my MK3. But the design is seriously flawed. As supplied, it sits over the top of the roll, so it causes a maximum bend to the filament of about 30 to 40 degrees! This required Prusa to insert a Teflon ring due to the acute friction that causes.
So, using their notion of guiding the filament, I made some changes.
1) This guide does not need to be screwed on, since it slips over the lowest arm rib.
2) It also has a small slot in it, so the guide can be threaded after it is loaded in the print head.
3) The maximum bend of t