Quote Originally Posted by JimmyHAD View Post
I've shaved with old types many times with modern blades, no shim, and got stellar results. I cannot remember the exact difference but I measured an old type blade along with a modern blade and the difference was negligible.
Yeah, I used the old type first; it has a small crack in the handle that I hear is common with them (you can see it in the bottom photo, just below the screw head and into the knurling a bit), but it holds the blade good and tight...on this one at least. I think I read somewhere that you could put a paper clip or something on top of the new style blades to take up the slack, but this one shaved just fine without it. At least according to what little I know about them.

I've only seen pictures of the old type, rounded end blades. Maybe the shim would make it a little less aggressive?

From what little I've read, the open comb ones are a bit more aggressive anyway than the newer safety bar ones.