rotation device for kite aerial photography.
My advice would be to replace the axis with an aluminium rod and adapt the picavet to hold the line on m...etal rings. Included the .step to modify.
This thing has not been tested in the wild....
credits to Juan Sirgado for the Gear generator;http://www.thingiverse.com/thing:331751/#files
3d model print parameters
4 m3 nuts and bolts.
probably wise to make the main axis from aluminium for strenght and stabilty....