I had been using an electric for the last 20 years or so. When my Norelco finally went "TU" I decided to go back to wet shaving. I never liked the newer multi-blade disposable razors, so I went to Heimerdingers in Louisville (http://www.heimerdingercutlery.com) and bought a Merkur HD. Tried it for a while then got to looking for my old Gillette Slim Adjustable that I received as a graduation gift in 1966 when I left for college. Surprise of surprises -- I found it tucked away in a box of stuff in my parent's basement. The Gillette still works great, but what's become my favorite razor is the Feather Stainless. The Feather razor paired-up with the Feather blades works great. The gap on the Feather is so small (.008") that it is almost impossible to nick yourself. I did have to buy a new brush, as the old one was really shot. I found that there are lots of good products out there now and wet shaving is still as popular as ever. While blade gap is only one of the specs that determine how a razor shaves, it's one of the specs that's easy to measure. Here are some measurements that I got on different razors: Merkur HD: .027", Merkur Progressive adjustable: #1 .024", #3 .035" (did not measure above #3), Feather: .008",
Gillette Slim Adjustible: #1 .008" - #9 .036".