Chan Eil Whiskers
Fumbling about.
The AS-D2 is my favorite razor no matter what blade I use (I prefer Personna Reds or Lord Platinums). I never had a problem using it, but I know you're not alone with struggling to dial it in.
I tend to go by sound and feel more than trying to visualize the angle, but I know everyone has their own methods. I get plenty of audible feedback using it, so perhaps try to make point of listening closely. I wish I had a foolproof suggestion since it really is wonderful razor, so hopefully you'll find it's sweet spot and start getting great shaves.
Good luck.
You make a very good point. Tactile and audible feedback are the guides to any success I've had with safety razors.
Happy shaves,
Jim