I've noticed a difference in the frame Hole of my new Tactical vs. my older Service. Whereas the hole used to be a clean half circle it now has a channel that sticks out into the hole the entire length of the grip. I don't have a picture of the new frame since my camera is down but I have drawn in red where this new part is on this existing image of the frame from James site. It's almost like a key. This looks like it would present a problem installing the Old Magwell and the new magwell from coming from Barsto which I'm told uses the hole to mount as well. Anybody else see this on their newer XD's?