Randy, thanks for the "two spine width" rule. That's a lot easier to envision than a vague idea of what thirty degrees looks like.
Most of the issue has been angle in addition to me being new, and once I figured the angle thing out, I was doing a lot better. So far, every shave has gotten better. I did 30 passes on canvas and 30 on leather this morning with the TI before the shave and had a great shave.