I've been paddling a ws diesel, which I found very easy to roll. I am now a proud new owner of a 8.1 mamba, which I love,except, I find it much harder to roll. Is this due to the new larger stern or the softer edges. I would like some feedback from older mamba owners and new ones too. Thanks for a reply

I just got a new mamba, play series, was adjusting the seat and went to tighten the two sliding screws on the side and notice they were extremely loose, the nut that is, which is behind the hip pad. should this be tight or kept slack to slide seat, thanks for a swift answer.