Double blade works best for me. Ghost, it's rare that I ever nick myself with the HB, but looking back, it seems like when I did, the times I did falls into 2 buckets - 1) I was trying to go in a different direction other than front-to-back or back-to-front and 2) I went 2 or 3 days before shaving and probably tried adding a little pressure when none was needed. You might want to switch to daily shaving - believe me it won't take long for you to get to get up to speed due to experience, not because you're trying to set a speed record.