hi all!
ian, greetings! i was the guy u saw on the ff138 on deepavali out in front of PA! great board isn't it!
i had a bit of reservations the first few times i used the board but the more i sail the more i like it.
agree with mike. speed, esp on a reach, is right up there with formula boards. depends on who's sailing, of course but i've been able to pass guys i used to just keep up with.
also have the same prob with the stock fin ... keep spinning out when i drive hard upwind.
for me (i'm a featherweight @ 65kg on a 9.4m2), early planing with the stock fin is as good as my old f135. it was better when i had a select 62cm fin on the ff138.
just a note, i've already got several dings on the nose (& one on the bottom) from hitting all the junk that's been floating around going at full tilt

!