I started out doing AutoCAD when I was fresh out of high school for around 2 years doing strictly isometric drawings. During that time, I was also going to school to get my certifications in Non-Destructive Testing. I held level 2 certs in RT, MT, PT, and UT-T. I was in non-destructive testing around 10 years. For the last 4 years I have done 3d modelings in the plumbing department. I have done CAD for a total of 9 yrs. Hopefully my experience level will be sufficient enough to handle your needs.