I purchased 37606, together with 602 after purchasing 605 & 607. These loco’s are superb. The quiet, smooth running is sublime, the detail is staggering, the cab desk lighting is great, simple attention to detail like this is fantastic forward thinking from Accurascale , the head & tail lights fading on & off when switched another first. I have bought these 4, the one DRS one I haven’t due it’s late DRS livery unsuitable for my layout, if it wasn’t I would have all 5 !.