Hi Michael, thanks for taking the time. That export setting in options is good to know. I was able to resolve this issue. I believe I did something along the lines of copying the solids. opening a fresh file. Changing unit system to inches (as that is what I initially started with file revisions ago). Pasted solids in. made sure "scale on unit system change" was checked. Changed unit system to millimeters. At least that's how I think I did that.