I find this an interesting topic. I have no problems with the sponsors, but I do have a hard time with the 3 rail scale definition requiring the scale couplers. Projects I have worked in the past (such as craftsman caboose kits) that I am requesting help/advice on in making close to the prototypes, the expertise is in 3 rail scale group, but because I still use the larger couplers, posting there is frowned upon.
Maybe I am alone, but I don’t feel like my modeling style or train preferences on my hi-rail layout fit into the traditional toy train forum. I am a much closer fit to the 3 rail scale, minus the scale couplers and fixed pilots. I am having trouble suggesting revised guidelines, but it seems to me that scale engines (or near scale) operating in a hi-rail environment is in the general area.