I have really sensitive skin. And everytime I use a Astra SP I get weepers without noticing and irritated itchy skin. Derby extra so far seems to work the best for me (BBS with 3 passes no irritation at all). Are there any other blades that feel similar to derby extras? I read that gillette silver blues are probably the most closest to them on amazon from a reviewer. Any similar blades I can add to my rotation? Currently using a Lord L6/Edwin Jagger DE89 with derby extras.