Toss it, sorry to be the Debbie Downer. But mold spores and a nice clean neg just don't sit well. If you are patient a 4x5 enlarger will appear on Craig's in no time....get the app "C Mobile", check it bfast, lunch and dinner, get ready to pounce. I got a mint enlarger free that way. I hate to dissuade you but a moldy enlarger is not something to mix with your beautiful Canyon negs....just my $0.02....