Question About Air-Tites With Rings

rking, I'm not sure about the foam rings, but I wonder if there might be any chemical problems with chipboard.
If it's the stuff I'm thinking of, the chips are bonded with adhesive.

My experience with them is a firm hold, but not enough to damage the coin (I've used several for trimes and you know how thin they are).

The foam ring is dense yet somewhat pliable. I have a couple AirTites with 1.25 oz Canadian Bisons using this setup and have no concern that the coins will shift from something short of a long drop.

Thanks guys! I ended up driving 40 minutes to a LCS and picked up a few. I can see if I keep them in the air-tite they are perfect and won't move. But outside the air-tite, the rings are pretty flabby.

Moxking - A few years ago I had an idea for a Lincoln type set that was based on all the different types of coins that have circulated with it. (Here is the old post https://goccf.com/t/165073). I had a few year hiatus from the hobby due to buying our first home and am just finding time to get back to this project. In a nutshell, I want to make my own album pages with holes exactly where I want them. The problem I'm having is making holes exactly precise to hold the coin in place. I have a large sheet of acid free archival board like a Dansco album page to practice on but when I make holes, I either get them juuuust to small or juuuust to big.

So my thought the other day was, find a stiff foam ring that will hold the coin and then glue that ring into the holes of the board. That way I have more tolerance on the hole as the adhesive will hold the foam inside the hole and then the coin can just be held by the foam (if that makes sense). I've already figured out how to finish the board with a nice acid free archival paper and make slots for a mylar shield to slide in like a dasnsco page, it's just the dang holes that are driving me nuts.

So my new thought is now using the air-tite in it's entirety and gluing them into the board but that comes with the new problem of the pages being to thick and when you turn them you will be resting air-tites on air-tites.

So if anyone has any ideas on a stiff foam or a way beyond hiring a CNC machinist to make these pages I'm all ears. I know this is a pretty big undertaking for a type set but it's the vision I have and really like the challenge of making things so it's right up my ally.