Watched someone plane a few times today in nearly nothing wind.It was averaging 11 knots,gusting 13 knots according to seabreeze graph but it looked much less.
He was on JP slalom 84 litres,55cm wide with 6.2m NP RS2 rigged very full with 36cm fin.
I was on 69cm wide Fanatic slalom, 7.1m and 44fin and he was planing before me and i weigh only 67kg.
Small boards can still work in light wind if you weigh only 60kg and have the technique.
That's why I hate these school kids and "ligthies" screaming past me in a 12 knot wind...but I get my own back when it gets to 20 knots and up, my 95kgs being able to hold down most everything 
(without having to resort to a weight-jacket).
(without having to resort to a weight-jacket).
.+ I get blown away 
when you big guys are frothing at the mouth in 30kts +
..
Sometimes would rather grovel much of the time on small gear rather than hold up a 7m plus great wall of China. Anything bigger than 6.3m for me starts to feel heavy.The benefit is i can usually guarantee a sail with a 7m plus/large board combo but no topspeed and less enjoyment. 8.6m these days is the in thing for light wind sailing,must put a lot of stress on the body,especially when gybing.
Wow thats amazing! 
Probably what we'll all be doing in a few years time. How difficult would it be to balance?
7.1? 6.2?
That's not windsurfing! That's like going to work. 
You'll find that with 67 kg if you use one of those ultra light setups from Severne (Enigma boom, 100% carbon mast and 5.6 sail) or Hot Sails and an 84' JP FSW you should be able about to plane as early as someone on slalom gear.
It might be a different story if you go up to formula gear and one of those spinnaker type sails but I think that's more work than it's worth.
In end you can make up for lack of sail size by bringing the weight of your rig down and using a super early planing board that's easy to handle.
Got out yesterday down at the Cott with the 7.4 O2 and - for the first time - 'the daughter's' JP Funster at 145 litres. Absolute revelation to be able to pump up onto the plane right from the shore (a bit of centreboard down helps get the board out of the water, then kick it off once underway). I am 87 kgs.
Once offshore a hundred or two the wind was stonger and there were some great fast blasts, not to mention the odd ramp to 'contend with'. All good for the first sparkly seabreeze of the season.
Here is what the wind was doing at the shoreline (between 4 and 6pm). I was a bit surprised when I got home to see how light it was, given the fun I had. Stress free too - the odd time I ended up down the beach there was no walk of shame, just centreboard down and a quick tack upwind. Centreboard down also makes uphauling a certainty. Amazing what board litres and a centreboard can do?
