GNNPNUT
Thanks for the link, that is a great article.
Using one of the excellent 8,000 gallon tank cars available in O scale for a three compartment conversion like some prototype cars would be a great kitbashing project.
We do have some multi-compartment tank cars in the traditional O gauge product lines that are scale or close enough to consider for conversion to scale couplers and trucks.
MTH makes a very nice modern era four compartment domeless 20,000 gallon tank car.
Two areas where there are real gaps in O scale offering are in tank cars under 8,000 gallons and in the 10,000 to 16,000 range. There were thousands of these cars in use in the transition era. San Juan has introduced a standard gauge 6,000 gallon tank car, the only O scale model in that size that I am aware of other than in brass.
Given the popularity of the O Scale Freight Car Guide to Tank Cars thread I have to say that a manufacturer is likely to get a good return on an investment in tank car tooling.
https://ogrforum.com/t...-car-guide-tank-cars
Bob2 and Malcolm posted photos of some nice older multi-compartment tank cars.