thank you Yronnen, I believe that is the advice I have been looking for. Now, you have given me the insight into how this is done. I agree with many comments, that we do not want to bastardize these fine old beasts. I will leave my 4 x 5 series b alone as it is perfect as it is. I will search for a destroyed carcass of a 4 x 5 and take the graflex back from it and install it on the 3 1/4 per your advice. As it is easily converted back, I see no harm in it. thanks so much! Here is a shot I took of my twins with the 4 x 5; I love these cameras!