I got in contact with a guy who successfully installed a kite on his freestyle in the US.

Yeah I've found those pics from 2001-2002 regattas. From the race results it seems to be a reasonable performer.

My crew and I would be 140kg wringing wet. We will however be checking the weight of the boat in its current configuration and hopefully chuck it on the water at some stage too before purchase.

I've been contemplating a forward floating beam like the nacras but wanted to keep it a bit higher off the water. The Dart's arrangement looks like a good compromise.

Another minor concern I have is that it has no boom. It is arranged like some of the nacras with the adjustable mainsheet position on the foot with a stiff bottom batten. I can see it having a detrimental effect on outhaul when saling downwind and being a long-time dinghy sailor it's a bit disconcerting not having one there, but is a boom really necessary. Any comments?

Nick.