Some people will go to any lengths to save a penny.Well, its in fact creating a slant effect. I find my Razorock 37 German slant razor very efficient. I guess the shallow angle and the "push-back" stroke is worth trying too.
But why isn't it possible to simply sharpen/hone a DE blade on a fine grit stone, like with straight razors?
Seriously, people sometimes use the inside curve in a glass to sharpen double edge blades.