Would that work as I am ultimately wanting to animate the movement....and I have no idea what a gymbal lock issue is.....So if I spawn the morph as legs down it should work with a 1.0 for legs down and a 0 for leg up but I don't know how this is different than just rotating the x axis....?

Windows 10 - Poser Pro 2012 - 64Bit - 24GB RAM - 4 x 3.40 GHZ processor