With a bit of luck, this should be the photo of the gauge(s). https://www.flickr.com/photos/13181394@N03/14433169120/ Would those who are interested, please send me your address (direct and not via this message board), to alan@xxxxxxxxxxxxxxxx Alan 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.