I always create a function Main() (err error) that I call from main. Mostly out of convenience though to be able to just write "return" for error checking

I'd also add regularly cleaning the nozzle (watch out, it's hot) before problems occur, just with Isopropyl alcohol and a paper towel. There are plenty of guides how to do this though.

I see, that's not ideal. (I somewhat liked the standardization effort of the Filesystem hierarchy though while it was current but I guess that's only a small bit of it.)