Retired mechanical design engineer also retired from the Marine Corps I use AutoCAD as my primary drafting program I dabble with fusion and inventor I have worked with SolidWorks. My main 3D printers have been Monoprice 15710 or better known duplicator 6. I have rewritten the firmware and some of the code to help them print better. I have just purchased the Bambu Lab P1S with a full set of a AMS to run 16 colors. Yes, A big jump and a huge learning curve.