FE160 + stock fin -> Spin-out

[Pacs]

Hello,

We are a nice new Formula Experience fleet from Galicia-Spain. The crew is composed by youths, weekend sailors (like me) and mainly for several skilled FWers that are remarking some issues from stock Drake fin.

Here we have an abstract/questions from the creew:

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General remarks:
- With 20 knots and more + 10m sail, board Spin-out frequently even downwind.
- With soft winds it does often spin-ot upwind.
- The spin-out is corrected easily when it happens.

Improving the fin performance:
- To sand the fin (the whole surface with a very thin sandpaper) ¿legal?.
- To give it rake backwards (over screewing 2mm in the fin base at back screew). ¿legal?

Recommendations to avoid the spin-out:
1. Flat the board.
2. More pressure in front leg.
3. Displace weight far from tail (towards noose)
4. Sand the fin. ¿legal?

Conclusions on the stock fin:
- Very soft-> Problems of control with strong winds.
- Few surface-> Favors the Spin-out.

Skill of sailing advised with strong wind:
- To do less pressure in the fin and more in the mast foot.
- To take the weight forwards.
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We will apreciate any comments, help, experience, etc. Trimming data, sailing stance would be apreciated too.

We need also some tips about Severne Overdrive 10m and 11m: Downhaul and spacers use.

Thanks too much

Paco