Not the biggest contribution

[rharrison]

I have had problems getting the springs to sit in place so I have made a small keeper to glue in the holes at each end which has solved my problem.

OpenScad Code
$fn = 50; cylinder(1,d=5.6, false); cylinder(5,d=4.9, false);

If you render this in openScad and then save the STL. You get a nice little spring keeper. I'll see if there is a better way to add the STL and STEP files to this repo.