Have you seen it or asked the appropiate questyions of all the points we brought up? FUNGUS.. shutters firing.. ROTTEN BELLOWS?..

more than likely you will need seals regardless. That is a DIY project anyone can do. Goodmen sells the foam kits n has very good instructins. if you don't understand anything.. feel free to ask?

get the manual n read it...
http://www.butkus.org/chinon/mamiya/...rb67_pro_s.htm