Summary

a parametrable telescopic stick.
you choose shell thickness, segment height, top and bottom radius,
and segment count.
the size of the stick once extended and the size of the overlap zone are displayed when compiled with OpenScad

Instructions

disclaimer
i dont own a printer yet, so this has never been tested. it may very well be an horrible deign that will never print correctly

this is basicaly a sliced conic shape.
make sure to set the variable deploie to 0 before printing (so all segments lay on the plate)
as this also is my first upload, i'm strugling to get code blocks working. i'll also try to use the customisation interface.
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edit
i tried to slice this in cura, and i realised that each segment is to be seen as a shape with an inner and an outer shell with some filling inside.
this probably will result in messy output for builds with ep < 2mm
maybe is it better to create segments as non hollow (ie no csg substract) and let cura build the shell only (infill=0%) with a 0.8mm wall thickness.
cant wait to receive my ultimaker original and give this a try..