Recently picked up a Baldessa 1b at the local 'antique' (junk, mostly) store for $5; it has a cracked RF window & sluggish focusing so I thought I'd try my hand at disassembly/repair (my first time with any camera). The top plate came off quite easily; it looks like the RF unit should be next. It also looks like there's one substantial-looking screw holding the unit in place, so my question is this: how do I break the torque on that one screw (it has a slotted head) without causing any damage to the surrounding casting/mirrors. etc.? I'm pretty handy with a screwdriver, but this thing must have been installed with the idea that it would never be taken out. And I just KNOW if I put any more leverage on it, the driver's gonna slip and take out the whole RF unit. I was thinking of putting a tiny bead of liquid wrench on it, but that seems a bit daft. Any ideas/help would be appreciated (and TIA).