I tried a Derby blade for the first time in my Merkur HD. I have to say I was not impressed. I was as careful as I usually am and still walked away with a few cuts. Plus the shave was not as close as I'm used to with my Merkur blades. I've read a lot of negative reviews about the Merkur blades but I've always been happy by their performance, even after 4 shaves. The Derby blades will be placed in the medicine cabinet, only to be used as a last resort. Any thoughts on a better blade?