Improvements and precautions- from somebody who's been there with a Scadden boat and learned a lot from the experience-
First and foremost, get hold of some spare valves from Scadden. He's about the only one that has them- they're an off-brand called "Bravo" from Italy, although he's been known to call them Halkey Roberts valves at trade shows and in his Youtube videos. They're not- and the two are not cross-compatible. They're not compatible with anything readily available in the US. A Halkey inflator will ruin a Bravo valve- it's slightly longer than the Bravo is deep- and they're quite poorly made. I went through several before I paid closer attention and realized I'd been misled by Scadden on the valves and the Halkey tool was actually ruining the Bravo valves. He'll spin some story about the Bravos being more expensive- but that's simply not true. He'll also say that you have to open a Halkey to inflate it, while the Bravo allows you to leave it shut and still fill the tubes- also not true. Works just fine on a higher quality Halkey
Roberts valves- it's a cost cutting measure and nothing more. Bottom line, the valves are delicate- only use the cheesy little rubber hose attachment he gives you and nothing else- And always carry a spare and a pump.
Get ready to replace the cordura parts on the boat- the fabric fades noticeably after a very short time- and they're not really substantial enough for heavy use. The straps pull away from the fabric and the buckles break easily. Aire sells some much better versions made of grey PVC.
You can upgrade from the aluminum oars pretty easily- and you will want to. I fabbed a pair out of some Werner touring kayak paddles. End of season sale, they were 1/2 what Scadden charges for essentially the same thing. Used a diamond drill bit to cut holes in the graphite shafts- and a drill press to be sure the holes were square to the shafts. The result is plenty strong enough for the application- the weak point will be the adhesive that holds the "oar lock" on the hull. If I were going to do anything other than a day trip, I'd get my hands on some solvent and adhesive to repair one of them should they tear off. If you're careful about inflation pressure, you'll get a lot less movement and stress on those. Under-inflated, there is a lot more stress at that point of failure.
Overall, these are "unique" boats. The design allows good function on the river as long as you stay well within the boats' limitations. Despite Scadden's "creative" marketing, his boats are NOT class V capable- go look at any product made by any reputable whitewater manufacturer (aire, sotar, maravia etc) and it will become instantly apparent that you're in something made for far lighter applications. And that is fine- you'll have benefits of portability and ease of control with fins in appropriate conditions....something you're not going to get in a true whitewater quality boat.
If you're going to do anything multi-day, or anything approaching class III, take a critical look at every part of that boat. As a float tube or gentle river craft, it's very functional- beyond that, in my opinion, you're pushing your luck. I pushed mine for one season- and then bailed for greener pastures.