I spoke to JP today and asked him about the wheel and he suggested finding a machinist and cut the wheel and fit it with brass sleeve.
Well it just so happens that my lovely wife works with a girl who's husband has a shop not to far from my work so i called him about it and he said no problem as he told me they do aerospace work and that would be a simple thing for them to do.I love it when i get lucky sometimes

Thanks for all your replies good info to tuck away in the old memory banks