Finished a boat that is basically a Sea Rider hull. I changed the top side to fit me better. Fast little boat but the key word is little. I am 200 lbs and find it twitchy. I can paddle it and have yet to dump it. I loaned it to a 150 lb paddler and he was very noticeably more stable in it. But this is a little boat. Everyone comments on how small it is.

I have found that anything for a seat makes the boat extremely uncomfortable stability wise. Even a 3/8" thick typewriter pad makes the boat very twitchy! So I sit on the plywood and I am really not comfortable for long with no pad.

It's a fun boat to paddle, and accelerates like a rocket compared to my other boats. I usually paddle something else because I can't get comfortable in it yet. But I have not learned to do but the first 180 degrees of the a roll yet. I built this boat largely for that purpose.

Here is buddy trying to paddle with the pad in place. It does have amazing secondary stability just when your convinced your going over.