My Fatip Grande shaves beautifully with Astra SPs. I'll try it with the Personna Lab Blues again, but when I was still mastering my technique with the Fatip, I found the Labs to be really unforgiving. The Fatip is already an unforgiving shaver, imo, so idk if I need that level of aggression in my life.
Shallow ... Steep ... Steep ... Shallow Does it really matter, just learn what is the best angle for you and the razor you choose. A certain angle may work best for one person and someone else may like a different angle. Learn what works best for you and what gives you the smoothest irritation free shave ... i think too many people get wrapped up in " you have to do this that way " and what they read. Don't get me wrong .. there are so many good tips on here but bottom line .... spend some time learning your individual razors etc and how they work best for you