There is a small plastic valve inside the system, that I too, drilled to far and it came out. I think I show it in the first video, but edited some of it out due to size... In the end - as long as you didn't drill all the way to the main "valve housing" (the black plastic section with the...
I've seen some posts that suggest our standard CO2 tanks (2.5, 5#, etc..) have 1/2" NPS (straight thread) fitting; while paintball tanks are 5/8"-18 UNF (also straight thread). I'm fairly certain the connector for the paintball tanks are PIN inject and O-ring. I've done some initial searching...
I couldn't help myself and I threw together two video's on youtube for those whom may not be mechanically inclined on how to tear down and rebuild the Coors/Miller home brew system. It was a first go at it and after drilling - i found a small plastic plunger that likely is a check valve to...