Designing an intake runner which changes shapes from oval to circle. I have the dimensions in and have done every option on bobcad v29 and can’t seem to get it right. I can connect lines between the two dimensions creating the runner wall, but it ignores the lines I draw. I’ve done cross section without those lines and results are always the same. When you look down the throat of the design the port is shrouded by the program’s extrapolation every time.