I’m pretty new to kayaks, so I’m a poor one to comment on rolling. I can’t imagine that the waveski would be that much different than a lay back roll.
I was in a kayak for the first time a couple of months ago. I rented one to go down the little local river for 6 miles, got addicted, and found a used WS Tempest 170. I got a few hours of paddling in it when I found myself paddling in 30 mph winds, on the wrong end of the lake. I realized how easy it would have been for me to capsize, so I told myself I needed to learn how to roll.
First, I was nervous about being able to wet exit. So I went through the motions of ejecting myself on land. When I felt pretty confident in my ability to wet exit, I went back to the lake to do some real wet exits. (I was more than just a little nervous, didn’t have anyone to go with me). My first wet exit, I think I was reaching for the strap on my skirt before my head went under water. After 5 or 6 wet exits, I had calmed down enough to stay upside down for the count of 10 before I got out. I wasn’t planning on trying a roll that day, but next I did. I think I bobbed my head out of the water 3 times gasping for breath before I gave up and got out. I think I tried it 3 or 4 more times, each time, bringing the boat back to shore to empty it back out. As I sat there, trying to understand what I was doing wrong, something in my head clicked. I realized that if I swept back with the paddle, it would keep my angled up somewhat. While I was sweeping back, with the paddle keeping me close to the surface, if I lifted up hard with my bottom knee, I could right the boat, then worry about me getting up after that.
When I went to do it, I paused, upside down, confirming that my paddle was near the surface, running through in my mind what I intended to do. Sweep back with a slightly angled blade, as soon as I started to sweep, pull up as hard as I could with my bottom knee, and keep the sweep going until I had my back flat on the deck. When it was time to go, everything went perfect, up until I popped up much faster than I expected, and went back over the other side… before I could get a breath of air. Next one slowed down, worked good.
I thought I had everything dialed in, but I found myself missing some rolls from time to time. I was missing them when I was exhausted from paddling. I hired an instructor to come out to see what I was doing wrong. Turns out, when I’m exhausted, I try to break down my steps, to doing my sweep and my knee lift in two separate operations. Now, after I’ve done a few hundred rolls, every once in a while I’ll still find myself doing that. Instead of a wet exit, I shake my head at myself, regroup, and do it all together.
Couple of pretty dumb things I did. First, I did it along, in hindsight, I should have looked harder for someone to come out with me. Second, I should have hired the instructor first…
Not sure if there is anything useful at all in that… But thats how I learned.