As a merkur HD user for the past year (which I enjoyed), I decided to venture into some of the vintage Gillette razors. I discovered the Gillette Tech with a feather blade is the perfect combination for my rough beard and sensitive skin.
I then bought a 1956 super speed and a 1959 fat boy to continue my quest.
I noticed I have been getting some rather rough shaves with the superspeed and fat boy (with a setting at 1). I have been using a Swedish Gillette with these razors since they seem a little more agressive than the tech. What do these razors have in common or how are they are different from the HD and tech?
Do they share a common variable? please help. As I will like to adjust my technique to enjoy them.