bobajob said..
I can't see where Quobba do quads
You may want to try a Quobba thruster set, you may be surprized. It should give you as much speed - or more - as a standard quad set, but with more control.
Note that by contacting Quobba themselves by email, they will gladly arrange any custom order: mixing FCS and futures, or a quad Quobba set if you want (with 2 fronts in the rear or 2 centrals), but it may be too big rear fins for your taste. I use L fronts + M front sides in rear in one of my board, but it is a 6'10" so I can have easily the foot on top of the rear fins. I tried this combo on my 8'4" and I found it too stiff, so I guess it will not be pleasant on a 9'2".
In a nutshell: try your daughter Quobba set! I have been using myself at 100kg a M thruster setup for one year before the L became available, their hold is quite sufficient, plus the small size makes them even faster...