Orange Whip said..I got planing today in about 10 knots with this combo:

SB GO 170L, 256 x 90, Ezzy 8.5 Lion, GSport 58cm fin. Geez the Lion pulls like a train.
Hey OW that's great news
finally you stuck some decent power on the GO
We love the old GOs for early planing down here at Sandstone
I think my 13yo son (62kg) has taken the early planing mantle now.....
Two afternoons now he has taken the JPSLW92 off me after the wind has died and done another hour on the water
8.5 Ezzy lion 8-10knts of wind .... he makes it look so easy I could spit!!!!!
cheers Jeff