The photo above presents the first four Proto:87 tyres to be found among the chips around my lathe. These are the 30″ pilot wheels, and their brass centres need to have spokes cut in before getting soldered into the tyres.
They’re not perfect, but every wheel is better than the last, and I think these will be good enough. At least, if 622’s engine truck is always derailing, making new wheels may be the solution!