In my mind, again I could be wrong, this is negating the advantages of a parallel 4-link as you lose the ability for each side to move independently. A triangulated 4-link makes much more sense or even 3-link.It’s a parallel 4-link. My travel from fully aired up to aired out is over 10” so a panhard is out of the question. This frame was built by one of the biggest shops in Texas, All Star Customs, that has been doing these forever so I doubt it was something to correct a problem. Shops like this come up with their own designs all the time. IDK, it works good. The only problem I had was due to the fact I only had 4 valves so the air would transfer from side to side and it would lean a bit but I’m looking forward to having control of all 4 corners now.