Hey Jeff,
That was the same model tube I started with. Nice but it has several problems with its design.
First the foam seat must be inserted into the tube before infaltion of the pontoons. And they don't quite fit right....kind of long and the velcro straps that hold it in the tube never held very good.
The second problem I had with the tube was that the outer cover is not very durable....the second outing to NPH it started to shred at one of the seams. I just used a little spectra and sowed it up.
The next problem I encountered was with the outer cover again....after about 6 months it began to shred again.
My advice is to look at another tube..maybe a fishcat or caddis.
Jef if you want you can take a test kick in my caddis to see how you like it.
Brian