Recent post on KF:
I understand that there is a lot more tubes out than foils which makes the statistics worse for them compared to the number of kites but anyway, from what I read, tubes are not that better to my point of view if I consider all the issues in very brands.I bought my 9m '09 rebel a few weeks ago and when I took in out for its virgin flight in 30kts it kept on collapsing/folding. I'm a 90Kg rider with the struts pumped up to the recommended 6psi. It kept collapsing approx every 30 secs - it got so bad I packed it away and ended my session.
A week later I was out in 25kts with the 9m kite pumped up to 8psi. The kite flew brilliantly, superb power and a definate improvement on the old 2007 models. However... after 30 mins I wiped out on a wave then the kite looped and hit the water (not too hard); one of the lazy-pump connector tubes popped off at both ends and the kite completely deflated except for 3 of the struts (not much bouyancy with 3 small struts!). I was lucky that I was only 30m away from the shore and managed to get back safely.