thanks for the input everyone i'm sure this will prove tremendously valuable and I'm going to change my blade right now so I don't forget. I know I saw poraso in a local drug store any thoughts? As far as your recommendations for the life of the blade is that in relation to each edge of this that for the blade as a whole I haven't really been paying attention to which side I using so as far as I know I could have shaved with the same side every time. Finally any recommendations on how to differentiate which edge is which, will a sharpie dot on the side of the blade harm it in any way?

cheers
-Omid