Core GT 9m or 10.5m provide a lot of grunt for little kites!
10.5m in 12 knots provides enough grunt for decent pop (S-bends, mobes)
9m in 13 knots (great for looping, trucks upwind).
15Knots + and you are lit.
A year ago I would have never believed it. If you get a chance, try one.
I'm 88kg so I'm no feather weight.
PS - Delta C so relaunch is instant.