keep in mind that on SAND you can move your weight much further back than on clay/salt bitumen etc.
with this in mind the mini yacht become a process of matching the centre of effort,centre of gravity whilst keeping just enough weight to steer with. most of the centre sheeted yachts ive seen images of seem to be adapted Class 5 sails.
note that theplume is putting the mast almost in front of the wheel.
thats telling you that the critical positions are very important. If you start down this path you ust be willing to build a few chassis's to trial and get right.
also consider that if your not using a really stiff mast wont need to centre sheet to get the sail to sit right.
alos consider where that style of yacht will be sailable.
it would be a bugger to play with on the tiny course at cherriuex last year.
i would like to see so pics of 6' pilots sailing those minis too