Certified multi-scaler here.My main scale is N followed by HO then O. N is standard gauge while HO and O are both standard and narrow gauge (HOn30 & On30).
Model?...HO. Although I do own equipment in the following scales: Z, N, HO, S, O...Just need some large scale to round things out...and then mix 'em all up on some mega-layout...!!!!bounce7