Gaffers tape is expensive, but it takes me years to go through a roll. I wind some on to a 120 roll film spool and keep it in my camera bag, very handy to have. Can be removed from most surfaces without leaving residue. I just bought a 5x7 Kodak D2, I have to check the bellows for light leaks. I'm inclined to try the E-6000 for any pinholes. If I had a tear to repair I wouldn't hesitate to use gaffers tape.

Roger