(If you see any grammar mistakes or info mistakes feel free to tell me, and I will fix it.)
So, lets talk about James.
For those who don't know, James is a 2-6-0 tender engine with 2 insid-blah-blah-blah-blah-blah-blah... who cares, everyone knows him. You know his basis, the L&YR class 28, mogul version, which never existed, to help with stability issues with the smoke box. His model, however, does not depict the fake basis correctly. The Rev's model was of the G&SWR 403, aka Austrian Goods, which was going to be Jame's prototype basis.But this wasn't carried out, for some reason. But my theory is that the Austrian Goods look weird. The smoke box looks short, and the smoke box door looks too small. It looks like the NER Class P3 with the cab shorted and opened up.
But then that brings up the fact that the L&YR 28 doesn't look like James either. The boiler is too high up, the bellpaire fire box doesn't match the shape, the cab height is closer to the fire box height, the cab windows are on the side instead of on top. There are some characteristics that do carry over to James, like the funnel and dome heights.
Lets try some other Moguls, how about the CR 34 class? It's a good loco, but doesn't look like James, no bellbaire, base of smokebox too wide, windows too circular, and overall is too Scottish. Nothing is wrong with that, it's just Jame's isn't Scottish.
There is one more inside 2-6-0, the DSER class 15 and 16. It does have a good resemblance to James, minus the dome, funnel, and boiler height. If those could be fixed, then we have ourselves a good James!
But, however, then James would be Irish, and we want him to be English.
In conclusion, there will never be a perfect basis for James, but we can make good, alternative versions. Like mine I came up with. It is a version of the LB&SCR K class (as below) with the footplate flattened out, and the splashers increased in size about 15%/20%, cab height increased with the windows being above the boiler, as seen in Jame's model, the outside pistons being removed, funnel height increase to reach the height of the cab, and finally the top of the bellpaire needs to be rounded on top, like James model. I would do it in photoshop but I would have no idea of what I'm doing, so I'm out of luck.