I recently bought a muhle R89 that came with a derby blade. Ive shaved with it a 2-3 times already and had razor burn wich iever had shaving with my first DE a weishi (newbie here) with dorco blade. Today ive decided to load my R89 with a dorco blade... No razor burn !! What does that mean ? Does it mean i was applyin yo much pressur with the derby or that i need a better technic with it ? Or is it that some blades or just not madr for some people ??