I bought the quick pins for mine, but have yet to install them. They are very simple, just 1/4"dia x2" long w/ a ball lock one end and grab ring on other. Installation should be as simple as removing the teeny #8 screws that came w/ the kit, and drilling the holes out to 1/4"dia, probably max 2" deep. About 10 minuites work if you have an existing install. Make sure you order 4 of them. My dealer only ordered one
Had to ask him to get 3 more. Really, you may be able to find these simple ball lock pins at any marine supply store. Also, there are no instructions w/ the optional pins.
As far as installing the backrests, first thing you need to do is take the rig apart so you can get at the rivets holding the end caps on, and drill them out. This is easy if you have a SE model, a club is going to require unlacing the tramp to get the crossbars out. A little more time consuming. After that, removing the end caps is a little bit of a pain, as they are silicone glued in place. I was able to wedge them out w/ a large screwdriver.
After that, put the whole boat back together, lace the tramp (again, looks like it could be time consuming, maybe 1/2 hr? Maybe less, never done it, but watched the video
), then plug the backrests in (there is a port & starboard), and follow the directions as to drill hole locations and drill size. If you are using the included screws, you will need to pull the backrests out a little, just to drill out the backrest tubes out the next size, again, the instructions tell you drill sizes, etc.
If you choose to use the optional quick pins, then you should be able to just use the first drill size as a pilot hole, then drill straight through with the rests fully seated, the same dia as the pins. Again, just double check your drill size, maybe do a test hole in scrap material & check pin fit.
Pretty easy overall. Hard to imagine it would take an experienced dealer "1/2 a day" to do. Seems max 2hrs should do it, maybe even less.