What type of weight system do you use Krijn? I would be interested to see how you make them. Also what was the final weight that you used on this particular build. Did it differ from previous builds? I assumed 25g was required for the STD.
For kites with a velcro at the tail I always use some lead from the tackle shop and make a velcro pocket for it. I use a hammer to flatten the weigths if needed.
Just like the Benson Deepspace.
I think in Kirby's Sixth Sense is 27 or 28 grams now. But it flies just like mine, which I really like (I didn't built it myself [Sugarbaker did]).