I-Type 2020 Extrusion (5mm slot) M5 Tap Guide

This is a guide for tapping an M5 thread into the end of I-type 2020 aluminum extrusions.  These are the type with 5mm slot width.

The model was inspired by existing designs like this one: https://www.printables.com/model/133736-2020-extrusion-tap-and-drill-guide-with-vise-sleev  
However all models I found were for the 6mm slot width profile type so I designed my own for the 5mm I-type slots.

Additionally, there is a hole for letting the metal cuttings fall out while removing the tap.  The hole also lets you see how far your tap is inserted.

The model is intended to be printed without support with the large face where the tap is inserted on the print surface.