it almost seems as though 4 axises(<--- is that right) would cover it in a straight line (well 3 and a rotory, bear with me here it will make it more complicted but probably easier to program)
because really its a 3 pivot idea that goes to 6(for the up and down) so if there was a way to move it up and down(maybe a screw) that pushed directy at the upper pivot point (the 3 )
and was nested in the middle of the corrosponding lower pair of legs, i don't know i explained that right but it seems like a good idea, makes a 4 axis a 6 axis (other axis on the rotary)
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