I can at least help on 4: Github: https://github.com/MattFerraro/CADmium https://github.com/MattFerraro/CADmium has the link: https://mattferraro.github.io/

I can at least help on 4: Github: https://github.com/MattFerraro/CADmium https://github.com/MattFerraro/CADmium has the link: https://mattferraro.github.io/CADmium/ https://mattferraro.github.io/CADmium/