I have three mismatched 7 days sets that I use. I have been really trying not to finish the third set, but just couldn't do it so it finally got finished. Now on to the fourth, which I want to take as slow as possible. The more razors I have the less I get to use each razor. I keep them in rolls, but I have the original boxes for most of them I kept. I plan on making some boxes for them or some nicer rolls instead of the converted pencil rolls. I usually don't put any oil on them. Just give them a few laps on linen after shaving to remove any moisture and residue. If it was really humid here I might use oil or if I had more razors where I would only use one razor once every couple of months.