When dual gauge O/On30 has been raised in the past people have objected that the near dead centre third rail would make it look like 3 rail O gauge track (Lionel etc) and thus have regarded it as unacceptable, at least where the layout is representing 3 foot narrow gauge. Prototype dual gauge standard/30 inch or 750mm gauge track does look a lot like 3 rail O gauge track, so this is not a problem if a 30 inch or 750mm gauge line is being represented. However sales of such track are likely to be limited in the USA, where representing 3 foot narrow gauge is quite common.(although 30 inch and 2 foot gauge lines are also modelled using On30).
Commercial dual O/On30 track would probably need to come from Europe, but currently there is very little ready to run in Oe or O16.5 (the European and British versions respectively) since the demise of the Fleischmann Magic train line. So the demand for dual gauge track would not be high. I would have thought there was scope for Bachmann's European branches to make O scale narrow gauge locos and rolling stock, but so far they have shown little interest, despite Bachmann On30 selling quite well in Britain and Europe.
Hamish
Commercial dual O/On30 track would probably need to come from Europe, but currently there is very little ready to run in Oe or O16.5 (the European and British versions respectively) since the demise of the Fleischmann Magic train line. So the demand for dual gauge track would not be high. I would have thought there was scope for Bachmann's European branches to make O scale narrow gauge locos and rolling stock, but so far they have shown little interest, despite Bachmann On30 selling quite well in Britain and Europe.
Hamish