I've had my eye on one of these for a while but one thing that concerns me is the blades. I know that I could snap a Feather in half and use that, but then it's almost as if part of the device is unusable due to the length of a DE razor. Dovo make a longer blade that acts in the same way, but is it a good one? Derby do them, but as their DEs are so mild I don't use them any longer. I have seen Feather blades advertised for their own brand of razors, but will they fit the Dovo?