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Mark _australia said..^^^ is 100L big?

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masse said..
Interesting read, and confirms my own findings when it comes to light wind wave sailing with larger boards. Twin fins are nice on larger wave boards, me thinks.
I've tried different set-ups (tri, quad, twin) on my 100 L board (Simmer), which I use with a 5.7 or 5.3 in light winds. Sometimes even with a 4.7, if the wind is up and down a lot.
And I've ended up almost exclusively using it as a twin. To me, it gives the best combo of ease to get going, ease of initiating and adjusting a turn and just plain fun. It rides more free and it is easy to keep it going through lulls. Also, when I drop in when sub-planing, it is easy to get into the straps and get a quick bottom turn done.
When conditions get more serious, I prefer the stability, control and connection that a quad gives, but then I will be on a smaller board. In light winds and/or fluky conditions in less-than-perfect and not very big waves, twin fins have returned to be my favorite setup.
I'm looking forward to working this out. The day that I turned the 118 into a twin we had up to solid 3/4 mast high and the board handled that beautifully, with no sign of the bottom turn being undone by wave power, despite lots of apparent wind from the cross off winds. In fact I felt a lot more secure than in previous bigger days when as a quad there was a palpable delay in climbing back up the face, making me think that the whole lot was about to come crashing down on me. Let's see what happens on the next big light wind day, but I reckon that the big old girl will do OK as long as that rail is securely set.