Well, go to andos's profile and look at his photo album.I think you will find pictures of the one's he made and wanted to sell.
He was also willing to do a group selling to people who are interested.
The email I received from him says at the bottom he is a suspention engineer, so I think he knows what he is doing. The test pair he made he was apparently using for more than a year now.
Because I am in South Africa, and could'nt let him make me a pair because it will cost me too much to get here and all, I asked for the .dxf files and detailed explanation.
He was friendly enough to provide it to me on one condition I don't distribute without his knowledge. I would suggest you email or PM him to find out more. They look good enough to make and use. I have'nt gotten to it yet though to make my own and install.