Craig,
the very existence of 1/29 scale is a compromise and alas will always be seen as so. ‘OO’ originated due the small loading gauge of British prototypes and the lack of availability of small electric motors to fit the scale confines of a ‘h.o.’ scaled British prototype. Similarly with the 10mm scale. ‘Z’ scale has been available for many, many years and yet 16.5mm ‘OO’ gauge still flourishes and not the more restrictive Proto-4 scale (18.83mm track), as does the 10mm devotees.
The status quo accepts 45mm track as the defactor standard for all largescale, even down to continuing to accept 332 profile as the standard. Consumers are reluctant to accept change and manufacturers are even far more cautious with their investment dollars. There is simply no market for a correct scaled/gauged 1/29 scale. Correct rail placement is in the realm of the very few, unless one models in 1/32 scale, 1/24 scale, metre gauge 1/22.5 scale and 3 foot 1/20.3 scale. Our hobby is generally a compromise of scale, gauge, badge engineering with prototypically incorrect roadnames, all as a manufacturing expedient to the manufacturer to maximise return on investment.