I built one a couple of years ago, the boiler, frames, tank & bunker are 1 big lump of resin, I'm not sure how easy it is to fit different chassis to the IP ones that Model Town recommend (if I remember rightly). I also modified the looks of mine a bit, I added a reversing rod, safety valves, a whistle and made a new chimney out of brass tube & plasticard as, frankly, the chimney is the model's weakest point
