A good photo can really go a long way. Back up and zoom in as much as possible to reduce perspective distortion. Try to get the camera square to the part.

Another nice trick for small parts with a flat face is a flatbed document scanner. Unlike a camera, the scanner ensures no perspective distortion. They also have a known scale (the DPI). Or, for more accuracy, you could calibrate the scale factor by scanning a ruler.

If you like OpenSCAD, you should definitely give CadQuery a try. I’ve used both, and CadQuery absolutely blows OpenSCAD out of the water.

What does the probed mesh look like? If you run multiple probe cycles, are the results consistent?

https://youtube.com/watch?v=PHiFNWJXWgI&feature=share

As someone who has been using Linux since the 90s and gone through many different init systems, I like systemd way more than any of the past ones. It makes adding services dead simple, and is much smarter about handling dependencies and optimizing startup sequences.

The main complaints I’ve seen about it seem to be people that don’t understand that systemd init is a separate thing from all the other systemd stuff. If you don’t like all the other systemd things, you don’t need to install them at all.