IJ, one of my friends designed them years ago. If I remember right, he tried it as a normal turnbuckle setup with a fixed sway bar mount. So the sway bar had to be unbolted to adjust, but that was it. During testing, he had problems with the sway bar endlinks not being vertical or as vertical as they should be after adjusting them to properly align a lowered car as well as the sway bar putting too much of a moment on the turnbuckle and twisting it.
So that design was what he came up with to remedy those problems. He was planning on redesigning them at some point, but hasn't worked at A1 for a long time now.
I should finally be getting around to redesigning all the arms soon though. I have talked about it with him and we came up with some ideas that should work and fix all the problems. I just need to get around to drawing it up and getting some pieces made. But that arm is hard to figure out the best way because of the sway bar attachment. The logical way to make it to keep the sway bar endlink in the right spot and have it easily adjustable has some mechanical design flaws that concern me, like threads in bending/shear, so we will see. I still need to draw it up and run some analysis on it in addition to the hand calcs. But at least I have accurate sway bar numbers to use.
But those arms worked for the time being and I wasn't sure if A1 was still selling them, but they still have them listed, so I guess they are.
