This may well be helpful to many of you. The usual threads/ cutting charts, etc, but also some less common data and calculations. http://www.alanjmunday.info/ and scroll down for "model engineer utilities" Alan http://www.alanstepney.info Alan Stepney's Model Engineering, steam, and workshop pages. 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.