That's a great idea and it'll get you ahead of the curve much faster than my fumblings got me up to speed.

I'd be interested to hear where on your face you need to change the angle a lot. Is there anywhere where you think you get better results with a really high (closer to perpendicular) angle? I think there are good areas for that, but don't want to bias you. Keep on posting about this, it's interesting.

Best wishes.