Well have just received a pair of USMicroJets 3rd Generation ECU’s for my pair of 180s that Jimbo has installed in our G4 A-10 Hog. Just ordered them last week after having use one of them week before last with Jimbo’s 180. Hum, not sure how to identify these AMTs that we have been using since 1998 & 1999….what USM-180s? Anyway finally service & delivery as promised with new harness and pumps that are maybe 1/3 of the old size weighting 3oz compared to 7-½ oz. These ECUs are interchangeable between all sizes of their turbines. So should you decide to switch a 3G ECU say from your 280 to a 450 just return it to the factory for quick reprogram. Will begin testing in our A-10 and advise.