Thanks.
Seller is at other end of the country, so not logistically easy to drop it back for what I initially thought might be a small problem.
Yes leaking from:
1. Rudder post. Repair done under sellers permission and documented / photographed. (poor design and assembly). Pretty sure it isnt leaking from there now.
2. Line guides inside cockpit. Pressurising the ski by blowing into it and covering all potential leak areas I have noticed some bubbles coming from the line guides, both from around the fitting/cockpit interface, but it also appears that the rudder line tube to fitting connecton is not sealed either. The worst one is on the left side, which is the side I remount from, therefore under water when I remount.
The ski does not appear to leak now on flat water, which is what leads me to believe the remaining leak source is the line guides. Yesterday I did a 12km run in pretty big seas, with a couple of remounts, and the cockpit/footwell was swamped quite a few times. Thing is, I love the way the ski paddles and handles, and want to stick with this brand, but the excitement of owning a brand new ski has been ruined somewhat by these issues.