Do it, you won't be disappointed. Put RDs kit on my sling last year and cannot believe the ride improvement. Wife and I both have bad backs, between us some 5 surgeries, lots of expensive metals installed. The air ride made our slingshot comfortable for both of us. Mitch is a stand-up guy and his support after the sale is unparalleled. Good guy, good product and great pricing in this sale.
I'd love to upgrade to the digital system, and may later, but the analog system is working great for us now. Added benefit is the airing down when stopped, makes it really hard to steal, and it is easier for us to get in and out of with our limited leg lift abilities. Compress and rebound is adjustable so you can tune the suspension to you own liking/driving style.
LC