That's 36 metres of PLA I'm not getting back
Great design and was really excited to print. However after 7 hours of printing, using the 0.65mm tolerance the screw fused at the bottom (like some other's mentioned) so had to break that. Then tried to manually extend but the scissor beams broke at the joints.
Can't say I'm not disappointed but thanks for the concept.
Printed on Prusa i3 Hephestos - 15% fill, 0.2mm layer @ 210°c with PLA on a raft (no support)