Mr. Hill,
You`re a star!

Your system worked very well......

Rolling between anvil & piece of floorboard, showed up the high spots.

Knock the shiny bits with lead tup, & roll again.

A rub with steel wool gives the required surface finish.

This engine has been developing for some time now, using Mamod parts whenever possible.
The `less than new` finish of the pipes will blend nicely with it`s well used character.
Thank you!

Not ignoring you, Stew......

I
had already annealed the pipes.

Right nice `ere innit!

David.