I've got a B&J 4X5 Orbit mono-rail with a rotating Graphic back. There are stri ps (three) of black velvet-like material that are on the bottom and either side of the Graphic back where the plate holding the ground glass mates to the other half of the back (when film holder is not inserted). Apparently there to provide a light tight seal.
Anyway, mine are worn and prevent the plate holding the ground glass from seatin g solidly on the left side (the plate can be rocked by pushing on the upper left corner).
Where can I fine this tight of light seal material? Is there a better method I can use to seal these edges or do I need to seal the edges at all? Any assistan ce is greatly appreciated, thank you