I looked into getting this system for my Wildcat earlier this year (just haven't done it yet). I spoke with the owner and he offered to help arrange the install. For me in the Dallas area that was Camping World. If I plan on a trip up to Elkhart, he was going to hook me up with his guys there. He also travels to Quartzite and other shows and said he would be willing to the install himself if I plan to attend any that he has scheduled.
This was a nice video that Henderson's did last year JoyRider Shocks Before and After Road Test
Trailer Life had a nice article on them last year. This is the Trailer Life TV Installation Video where their guys installed a set on a Grand Design Reflections Fifth Wheel Trailer Life Install Video
Sonny is very easy to talk to so I suggest you just give him a call on his cell phone. Here's his contact info:
RV Improvement Systems