I understand what you say Simmon. I wanted seats with side supports on mine hence the middle seat has a fixed back rather than the removable. The rear seat on mine comes completely off if you wan to race the boat and the A-frame too.
I don't think that my boat gives a hard ride on a swell. However, I haven't been at sea state more than 1.5-2 mtr high waves. There I could do 30 knots and it was relatively comfortable. The trick with my boat is to keep it on the plane at all times otherwise the ride is harsh. On the plane you get no spray on the deck and it flyies.
But any way hope to see you in Les Arc so we can chat about the boats and skiing LOL