Move to KiCad 8 & latest JLCPCB capabilities check

[mac-aron]

Move to the latest version, and cross-check with most up-to-date JLCPCB capabilities.

[DocMoebiuz]

Can this be closed then?

[Cimos]

@DocMoebiuz, It looks like the maintainer is no longer active. I have put some effort into taking on some of these issues and improvements in a fork here.

[DocMoebiuz]

@Cimos - thanks! I will give it a try!