I weigh 85 kg and sail in 12-15 knts winds on a mostly flat, or almost, lake with a Bic WindSUp. I am using a HSM 8.0 most of the time, but I' wonder whether a larger sail like a 10 or 10.5 m2 wouldn't give me a bit of extra power, and perhaps help me to reach the planing threshold.
The only thing is that I usually uphaul. I have no problems with the 8.0, but doing it with a 10 m2 may perhaps be a little harder on my back ( and I am not young either..).. I would also have to get a 490 cm mast or may be buy a longer extension to fit my 460 mast ( my current MF is 46 cm. ). Is it worthwhile in terms of additional power?

Any comments ?

Thanks

Francone