Splattys dont have seals, it's a weird metal on metal seal from what I understand. You can put a 12g seal on there and it will work, but will fall out each time you change 12gs. Now there is a link on here that shows you how to swap out the existing 12g pierce pin for a cci one. CJOttawa I believe has the link.
As for the game, I will keep my eyes out. I have everyones stuff here. Next week so far looks good for me, but Amber wouldn't be able to make it.