I have 2 RM2's, one stock and the other drilled to 5/64th's, right now both with 1.0 ohm builds in them on a Mini and a Woodvil. I like the larger hole's due to my long lung hits (my VA Cyclone is 7/64th's that is even better, the IGO-S to 5/64th's), but the stock is working OK as is. Even so it will be drilled out when I get to it, probably to something around 5/64th's willl be plenty since I don't run sub ohm on the Woodvil.
hands are sore. LOL