Simple vertical Filament Guide

I looked briefly, for a clip on filament guide that could be pushed over the plastic frame of my reprap printer. I had just been guiding the filament over the frame and letting it drag but I wanted something. I found a couple of these but in all cases the slot was parallel to the hole in the guide and while that design might print better, tt does not work for me.

So I went into Tinkercad and built one.

This is not supposed to be pretty. I made the hole bid enough for 3d filament but the