This is a printed version of the paper template shown in the plans. It fits 1.25" OD Tubing and has 6 holes. The pilot holes fit the small spring loaded center punch. The holes line up 1/4" from the end of the tube when this guide is slid onto the tube flush on the end.
I printed it using PLA,0.2 layer, 30% fill, about 15 minutes on my Monoprice Select Mini.
It could be easily resized for different sized tube and hole count. If anyone needs the Fusion file just let me know.
Drill Guide 6 V1 is 1.25" 6 holes
File 156 is 1.5" 6 holes
File 158 is 1.5" 8 holes
File 11256 is 1.125" 6 holes
Video link using these on 1.5" Elevator Torque Tube 8 holes - https://youtu.be/Q3wXLSmzuB0
If you need other diameters or hole spacing send me a message here and I could add that to the list.
Depending on your printer you may need to scale up or down to get a snug fit on the tube. I have printed all of these files and adjusted the ID of the guide for a snug fit. I am printing on a MonoPrice Select Mini V2 using the out of the box settings, no adjustments to calibrate x,z or z scale.