If it were just an angle it probably wouldn't be but it curves on one side and has a slight curve in the other direction. I would also like the length to be accurate to a few thousandths of an inch and have full contact all the way around the ends of the tube. The final fitting can only be done after the end of the tube is hidden. It could be done with careful measurement, trial and error, and carbon paper between the end of the tube and the mount but I've got an easier way.The measuring of length and cutting of that angle just doesn't look that hard to me.