The Dutch used 8 rifle calibre MG's on the G.1. I wrote a story in the stories selection of how one pilot shot down 4 a/c (1 He111, 1 ju52 and 2 Bf109's) in one short flight (http://www.ww2aircraft.net/forum/stories/best-pilot-16209.html). So it seems that this armament was more than adequate. I wonder however how much this had to do with the fact that all MG's were centered in the nose instead of in the wings?