Well I've contacted them and although I was able to get a switch when mine shot craps, I can't seem to pin them down on o-rings. Does anyone even have the sizes?
That being said, I love my Valkyrie, and I was lucky enough to get a new Mini and just slightly used one for a great price. I love the mini's almost as much as the full sized one. Ya, you need to carry more batteries but the flavor is simply awesome in those little guys.