Mine did not function with low brass 100% of the time, it was a stove pipe machine. I guess I could have waited and see how it progressed but I wanted it properly vented and RAA was footing the bill. The fewer holes the more picky they get about being clean and what not.
I understand that is the story that RAA is using now but before it was that the 2 holes were a special order for the russian military that got sent here by mistake, Clyde at RAA told me that one. I doubt there will be any more 2 holes seen going forward after they clear out the inventory.
CGW agreed to convert mine and RAA agreed to fix it and ship it for free so I figured I might as well get it fixed. I would rather have the proper specified amount of gas vents than just enough. You guys with 2 may actually have 3 or 4, they can be up at the edge of the gas block and they angle forward and impossible to see from above. You need to feel them or look in the barrel.
They can function with 2 holes but the general consensus is that if you have a problem RAA were replacing them or fixing them and paying shipping so it must have been considered an issue even though they may be pushing back now.