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.