Hello all, this is my first post at APUG after long period of reading. First I would like to thank you all for such nice and informative forum. I have realy learned a lot. Now to question. I have this nice "Polaroid Pathfinder 120" land camera that I would like to covver to 4x5 or possible 6x12 format, I havent decided yet. I have collected some guides and got some know-how from the net but I still have a few questions. - As for me in Europe is to expensive to get the Graflok back, can I use Sinar back? I have old Sinar Norma back that I can sacrifice - Is it possible to change the lens on this land cameras with something like Linhof lenses? I think this is it for now, I am sure that it will come more questions and I will share my knowlage with you as my project develops. PS- I am sorry for spelling mistakes... Best regards Neno.