- Mar 14, 2004
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I'm working on a design for a 1950s B-grade sci-fi type bird, with only enough tube to hold the very long nose and tail fins (using the Apogee BT-70 fitting blown polystyrene cones). I want the 3-cluster of 18mm engine tubes to project out the bottom of the tail, sort of a Flash Gordon style business end. Any ides for how to project the cross-section of the 3-cluster onto the very long, tapered cone so I can get a reasonably accurate cut to fit the clustered tubes?