Drill guide for pipes / round stock

This fast to print drill guide for pipes and round stock makes you hit the center of a pipe every time. 
The whole thing can be printed without any Supports

The use of 608ZZ Ballbearings and printed inserts makes it possible to use this piece of equipment time and time again, without any significant wear or loss of accuracy. The easy to model and fast to print inserts can be made to fit any drill up to 8mm. The notches on either side of the guide aid in finding the exact spot you want to drill.

In case you have any ideas for improvement feel free to message me or remix the model yourself.
If you print the model, i'd love to see a picture of it, leaving a Make would make my day.

Happy printing and drilling!