Something worth explaining in greater detail is exactly what was going on with my path sketch. Why is it that it rebuilt and the hose going into the valve was not in line with the fitting as I thought I sketched it? In fact, I did not sketch it to be in-line with the fitting at all! That's what I'm getting at. I sketched it to be in-line with the Z-axis of my part. When I started rotating my part the Z-axis of the part rotated with it, and the hose followed accordingly. Some other things that could have caused instability: If I had mated the hose to the fitting on the valve and then moved my valve vertically (along the Y-axis). There would have been conflicting mates for sure!