Check out friendship shaving YouTube channel, Mark speaks about the feather WSD1 it's basicly the same thing as the ASD2 he talks about how there is very little tolerance on getting the angle correct and he explains it very well, I've had my ASD2 for nearly 2 years and have had exactly the same findings as Mark, even now I have those off days that I don't quite get the angle right and don't get as close, in my opinion the irritation comes from the temptation of wanting to press on. In all honesty I never get BBS in 3 passes on my neck but that doesn't bother me at all even if it takes 5 passes with a very light touch the result is what matters to me and 5 passes with a very light touch gives me the perfect irritation free BBS shave, my advice would be focus on the angle and the pressure and forget the number of passes, hope this helps