Hi Riverotter and CSXect,
sign1 Go ahead, I don't mind being hijacked sign1
I think the term is "Rubber-Gauger" when you have so many different trains.
I'm a "Rubber-Gauger" too. HO, Sn42, On30 and Hn42.
Yes, there are two different RTR tracks available for On30 that can be used on modules.
Peco makes On30/O-16.5 track and turnouts. They are a British company and the ties are a little chunkier because of the O-16.5 [7mm] scale. The rail is code 100. There's 3-foot flex-track, LH and RH turnouts and a wye available online or through your local hobby shop.
The Peco turnouts are radius type. The frog number is ~5-1/2 with 24-inch radius curve. The wyes are 36-inch radius curve.
The other track is made by Micro Engineering [ME]. They have American O-Scale [1/4"] detail and come with code 100, code 83 and code 70 rail on the flex track. The turnouts use code 83 rail. Also LH, RH and wye, but they are numbered frogs [#5] with straight diverging tracks.
Most of the guys in the 'States use the Peco track.
The group that I am in is hand laying the track and we have mixed code 83 and code 100 rail and use transition joiners between them...
Either code 100 or code 83 rail can be used, but your local group may have a preference.
We all want deeper pockets and more time. :mrgreen:
Follow the links in my earlier post and you might be able to find a group close to home.