Thanks Jeff. They are really helpful ideas. I'm driving the neighbours mad machining the castings which seem to have been forged on the hobs of hell (just wait 'til I get I to the line boring of the armature tunnel!) but it is so far a nice easy and quick project. 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.