Great to be back at LG again.  I wasted a fair bit of energy early trying to "make do" with the old 6.7 but it is flogged(when overpowered by 1 fat bastard).  I had my 6.4 penciled in a sold and tried to keep it in the bag but it would be a wasted trip if i didn't (sorry Nic). Good news for you is it works really well on a 400 with 42 extension.

Tried my new weed fin initially(Tomahawk P 245@45) and it worked like a charm.  You could really stomp on it and it was super secure in the bumps through the middle.  I changed to the vector only when I had a slight spin @39.5.  I think I have the leading edge a little sharp.  Might get to use the 21 version in the speed board tomorrow(today).

Falcon 89 - EvoIV 6.4 - Tomahawk P 245@45 then Vector weed 27