if you are in brisbane and sailing mainly slalom then

at your weight 6.6 would be a perfect next size down size. after that the next size down for you may be a 5.3 you probably won't use any smaller than that unless you are going in the surf. and for sure the smallest you will ever use around here would be a 4.7 and you may only pull it out every 7 years.

cool,

i think 6.5 to 6m is a bit close together. 6.5 to 5.8 would be nicer. then you can use the 5.3 when it is howling next feb/march

edit....

thought i would also say, that if you are going to start racing in the new series then you may need a bigger board. knowing what the other guys are on and due to your body weight you may need a 125lt wide board as well. for when it is marginal. it depends on what wind limit will be set at each meet.

it is not totally necessary but would help due to our light winds. maybe something for down the track. therte is nothing more frustrating then watching everyone scream off into the distance on bigger sails and boards.

jc,

I run various boards from 75-105L

My weight runs between 86-90 kg (winter)

Sail size for me, 7.0 12-16 knots
6.0

Hello fellow wello sailer great to see your getting back into it JC.
I agree with Gestalt on the sail sizes 7.6,6.5,5.8.
I don't think the boards the prob for you maybe a bigger sail would benefit more, as long as you can comfortably float on the board you should be ok.
seeya on the water vando