Me too. They’re sold by the inner diameter, and the outer diameter is 0.2 mm bigger. 0.8 mm is a tight, but possible, fit for pin headers, and you have to drill out at 1 mm, and the flange is at ...

[rahmanshaber] used FreeCAD to get the outline of each part from the 3D model of his PCB, and KiCad to design the cutouts; skip to 7:30 or ... chose to use a hot plate to do the soldering, but ...