At 01:03 PM 6/16/06 +0100, you wrote: >is not good practice to run with the regulator open and the firehole doors >open but does not have the serious results with a copper, silver-soldered >boiler that it does with a steel one. - Dave Dave, What are those results? I've never heard mention of this. Regards, Harry MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.