Fiery must be a goldmine of these down there, do not think diesels in the US every achieved the wide usage of the UK and Australia of course we had a few makers drones K and B and a few others. The biggest inroads here are the Davis conversions since 1975 and the PAWs my thought

Oh and the model names the Brits came up with Vibramatic sounds like a washing machine that would scare most American modelers away