Worked for 20 years as Mechanical/Electrical engineer. The following years as a Software developing engineer. The last 12 years I runned a plastics-welding business. In these days I developed my 3D designing and printing skills. My first 3D printer was the Reprap, followed by 2 types of Mendel90-type printers. All 3 self build. Nowadays I am very happy with my BambuLab P1S printer with AMS.