Not two blades, but I've used two razors in the same shave. With several days of growth, the Merkur 39c slant gets the nod for the WTG pass for beard reduction. The 39c is so much easier on my face with several days growth. Then I use the R41 for the XTG and ATG passes for a nice BBS shave. Otherwise the R41, for me with several days growth, tears my beard.
