Has anyone replaced the bellows on their Omega DII's or D2's? I carefully removed the four small screws on the negative carrier stage, but the bellows seems to still be stuck to the stage. I didn't think the bellows were glued to the stage, but I don't want to force things. Maybe it's just stuck after years of being in close contact. I need to remove the bellows without damaging them to put them on another chassis. Thanks.