We're going to be hitting the other end of the component failure bathtub curve for these units over the next few years; so what's the long term fix? I don't think messaging Huttojb for every repair is a sustainable solution (despite his sterling service so far!).
Had no issues with mine so far, touch wood, but would like to keep the car going for a good few years yet. Pretty much everything on it can be sorted by local garages for varying cost, but these units are an outlier as you can't easily just get a scrap unit due to NATS, can't really repair the unit in situ, and can't really buy an OEM replacement. Is there any option to use a completely different system coupled with a chip that keeps NATS happy?