Congrats, Tommo!
I wouldn’t worry so much about the slant of the teat. That’s not really what you should be looking for here! After the Andy Wood interview we’ve had to re-think our concept of teatslanting entirely (and biology, too)! In short, you’re not trying to influence the way the teat is slanted, you’re trying to change the mouth orientation so that it moves on a different diagonal.
As always, a video says a thousand words. Post any footage you might have and I’d be more than happy to take a look.