I'm about to start machining the base of the chimney on my Elidir. I will of course fly-cut the bottom surface to match the smokebox but I wondered if anyone had got any hints or tips about how to machine (?) the rest of the base - or is it just a case of "filing lessons start here!" Regards Dennis 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.