And I read somewhere that the whole telescope rotated on wheels that came from scrapped GWR loco bogies - although the mass extinction of castles wasn't until 1963 or so. Either way, an impresssive piece of "adaptive engineering". JohnP 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.