- the On30 Scale is still O - 1:48; it models small equipment. Try to avoid calling it "Big HO", except in a bar, late at night; the HO guys just get all creeped out.
- 30" = 2 1/2 feet (not an unknown actual gauge; not even uncommon back in the heyday of narrow gauge construction; once a common industrial gauge).
- "..HO...gauges out 31.29 inches in O...closer to 3 ft gauge." Last time i checked, 3 feet = 36 inches, farther from HO in "O World". And, can you see it?
- they used HO gauge for all kinds of obvious manufacturing, marketing and equipment reasons. Not to mention scratch building: think of all the mechanisms and track available for it. True "On3" gauge has track and parts available, but little, and more expensive than
HO items. I would use purpose-built On30 track with proper ties, etc., in more visible areas, with plain HO in middle-ground and back. (Not an original idea on my part, of course.)
- On30 is very appealing; "if I were starting over..." - maybe - but I don't like it on 3RO layouts as a short line or whatever - the 2-rail track just makes that 3RO center rail look that much odder.