Simon,
Trick posted the thread to "muster an opinion", and "it's too complicated" is merely that, an opinion. It would, of course, be more constructive if those persons would offer some explanation as to why they have that opinion. Having said that, most people on this thread have given some form of explanation and are offering constuctive criticism.
If you post your idea's publicly in order to get feedback, you have to expect that some responses will contain opinions that have no factual basis, meaning that those opinions are worthless, and they should simply be treated as such.
As a person who likes to 'tinker' and experiment with new idea's myself, I am all for innovation, and you have my congratulations on coming up with a solid idea which has been put into production. But it is my opinion that safety is of paramount importance, especially when kitesurfing has a reputation (whether unfounded or not) of being one of the most dangerous sports. For this reason I believe that all members of the community have a duty to inform a person if they believe safety could be an issue.
Without undermining Tricks creativity, the system he proposed was not going to behave in the way he had intended, which could potentially have caused him (and others) problems.
It could also be argued, by the same rationale, pointing out that something appears complicated is a valid comment, because as a general rule, the more complicated something is, the more there is to go wrong. Ask any soldier.
But I've had more than my tuppence worth..
And I think I've won the prize for 'most pedantic'
(Trick, keep at it mate, Simon's pointed the way for all innovators, as well as indicating how long and complicated the process can be!)