hey - just noticed your comment about your tubes...
The seams on the original tubes on my boat let go.
Was strange because the adhesive sort of just gave up the will to live.
So they looked like they were airtight when they had air in them!
When it got cold and the air pressure dropped, they would lose loads of air because the seams were not being pressed against each other, sort of like tacky glue instead of set glue.
Replaced them with Hypalon tubes and all good now.
Yes the boat is a little "tippee" as you called it at rest. I had a Searider before and that certainly wasn't due to the flooding hull.
The other thing I noticed is how much spray the Gemini throws up compared to the Searider, although I do like the better seakeeping of the hull
(waits for deluge of searider owner comments), and the lay up on my boat seems extremely substantial all round. I can barely flex the hull on my boat when its sat on the trailer, I could always get flex in the searider hull when I pressed on it.