A first whack at re-rendering the basic idea for 3d printing...

...and experimenting with zip ties for assembly.

No axial stagger between rods when closed, so length overall = length of one rod = 120mm in this instance. Range of motion limited short by ~10% because I started the basic layout with an application in mind -- i.e. could be ~12% longer throw at max extension allowed by 19mm bearing length and ~7mm off each end of the rods for attachment. Two rods are packaged close together for best yaw resistance (lesson from a try at relaxing that) while breadth between those and third rod can be more or less per application.