One more suggestion that has helped me: Before you load the film into the filmholder, tap it two or three times edgewise on the counter (somewhere relatively distant from your holders) to remove any particles remaining from cutting the film. Many times there are small burrs and strings still attached to the sheets which detach upon loading and cause pinholes. The film manufacturers are not nearly as clean in this respect as they would like you to believe. You'll be surprised at the pile of little black specks you get doing this that would otherwise have been loaded in with the film. Hope this helps a bit in the war on dust! Regards, ;^D)