Thought I would post this here rather than in the for sale forum as its more relevant. Just wondering if anyone has an old scratched 67mm circular filter (with front thread) that they can't use anymore? I've got an ND filter which I keep in a bag with the hood attached and would like to be able to screw a cap on the backside of the filter to stop it getting dirty whilst it's in the bag. Willing to pay a couple of quid, but no more really as i'll just be using it as a cap (or I can drop a couple of quid in the Mountain Rescue donation box instead) if someone is willing to post it to me. I'm local to Edinburgh and can collect if you're in the city.