"Hi Chris. I have been frustrated with getting 0-4-0's running well in HOn30. You seem to be having some good success in Nn3 and HOn30. Are there any particular methodologies you are following to achieve good running in such small scales? Rod Hutchinson, Australia."

"They came with the kit. 3 layers of etched nickel stacked up into the rim of the wheel."

"OK where'd ya get those spoked driver wheels?"

"In the end I went with styrene sprayed with texture paint. Much easier to control and less messy."

"Hmm thinset is a good idea. Or os that bolt cement? I have heard good things on the bolt cement too."