Hey everybody. The other day I went to fill my wifes v3. It had drained into the collection tank and the carto was soaked. Yes I use 808 cartos in mine. I cleaned it all out and set it aside to dry. Then I went to fill mine and again carto soaked. This got me to thinking and looking at my other 2 newer tanks. I did air vaccum test on all the new nicke plated tanks I have and they all had signifigent air leak. I went through piece by piece and tracked the issue to the main cap orings. They seem to be to small. I replaced them with some danco #67 orings from Home Depot and no more air leaks. The dancos do not sit all the way inside the tank like originals but they are close enough and no more leaking. Thougt I would pass this info along incase someone was having issues.