Just bought another two of these models so making up a decent sized train now (I now need to weather a dozen of these!). Build quality, weight and 'feel' of this model set a high bar for others to aspire to.
I do hope more 7mm models will come from Accurascale in the near future - this hopper wagon was an inspired choice as it covered so many years and areas of the rail network - finding similar facets in another prototype is the key (and selecting one not already made by other manufacturers). I'd suggest a bogie tank wagon or a bogie freightliner - both could stretch from early 1980s to 2015 or later I think.