Len, Yes, you are right. I'll try to make it over the next week or so. Of course, if you are free on Sunday you are welcome to a lift to Donington. Just let me know. alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx www.alanstepney.info Model Engineering, Steam Engine, and Railway technical pages. ----- Original Message ----- From: "Len Smith" <parnobal2@xxxxxxxxxxxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Friday, October 15, 2004 3:32 PM Subject: [modeleng] Re: Unknown Thread Looking in Newne's "Engineers Pocket Book" I see that there are no less than 20 separate parameters with which to measure any thread! Far more complex than I ever imagined. Len Smith ps. Alan, you really ought to pop over some time and collect the above. 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.