Hey Pink, think you have the measurements swapped. The outer specs look like the inner specs to me, and vice versa.
So the x1 arm is about 1" longer than the savvy... Not wide enough at the bulk end, I would like to find something close or wider than 58mm there, so it will fit nicely between the stock hinge pin braces.
I need to set up a bulk and arm and get some ball park measurements that we can zero in on.
And here is a new pic, reference the measurements to the letters by the question marks. Should make things simpler...