O scale ...if you look in the NMRA standards O gauge listed as ...1/4" OR 17/64" ......when this was deemed the gospel..1936.....outside 3rd rail was the standard practice .......2 rail would be 3 years in the future for O scale ...
Don't get hurt falling off of one's high horse
Any one who has a ruler knows 1/4" is not correct for O gauge track .
In the words of that great scholar Rodney King " can't we all just get along?"
Cheers Carey