Another simple question. I'm looking at products on the internet at the various manufacturer web sites. I am now at Bachmans site. They offer: HO N scale O On30 Large Scale I am starting to go nuts. OK, is "Large Scale" aka "G gauge"? Are there any other terms that G gauge goes by? And while I am at it, is anything that is termed 45 mm also G gauge? I know that this is the track spacing but it seems like every manufacturer out there trys to create their own terminology.