Thanks for the help! I'm new to LF, so I certainly need it. I shot a 4x5 Speed when I was in High School (30 yrs. ago) and decided to buy one recently. ???. Back to the masks.
One reply mentioned that the #10 maskes are hard to find. FYI, Midwest Photo Exchange in Columbus, Ohio (midwestphoto.com) list #10 & #11 masks as new for $19.00 ea. in Shutterbug. That's probably expensive,I wouldn't know, but they're there.