All of the Contributors are modeling in O scale/gauge which is the original and specific intent/purpose of the Repository. Firstly, we would like new comers to 3D printing to have *early successes* and not become frustrated, even by adjusting the scale... and secondly, for modellers not to *have* to constantly reinvent the wheel freeing them up for more creative endeavors. If someone mistakenly (lord knows it could be me... I could even label the scale incorrectly) puts up the wrong scale file please let me or one of the Contributors know and we will deal with it. I'll add some verbiage to remind folks that it is for O only.
Thanks for the insight!