Hi Steve, I ended up using Markits crankpin spacing washers instead. The AG versions being used as coupling rod spacers on a different loco.
Thanks for your offer on the cosmetic frames, but I am not modelling the same mogul as you are. I am modelling a few GWR inside and outside frame locos right now. So ‘thanks, but no thanks’ on your kind offer.
Cheers, Dai Davies