Mick, it is not a loco I have any desire to posess but seeing your etches going together makes me think that I would like to build one. It was the same with your LNER locos. The GEVO looks like it will be a major advance in refinement in US loco building. I wonder if a kit would sell? Maybe not in any quantity, with the dreaded 3 rail toy train curse pervading the states. I was told recently by one of the local operators that their 4,500hp GE engines are costing $40,000 for engine lube oil a year compared with close to $0 for the same rated EMD powered locos. They are still very reliable but it is changing their favourable opinion of the GE locos. Not sure whether a similar situation exists in the US.