4. Mamiya RB Polaroid back: I didn't check this before posting. The light seals on the adapter are sticky and need replacement. I'm reducing the price to 3,500 JPY including SAL shipping.
I would like the Pola back if it fits my RB67 Pro S (?). Though, how is it possible to replace the light seals (I'm a newbie)? And do they need to be replaced before being taken into use?
It will certainly fit your RB67 ProS, as well as the Mamiya Press after removing the adapter. If you can cut a piece of cloth, you can do it yourself. Pre-cut light seal kits are available on eBay, or you can get dense foam from a hardware store and use it.