Doing some research and word on the internet is due to how much bigger these fins are, they damage the fin plugs particularly those with a carbon base. On the other side, glassed on fins would be a struggle to protect taking overseas and reduces your choice of fins to choose from not to mention their permanence and damage in surf.Side note, anyone know the difference in ride between keel fins and your standard type of fins?
If you go plugs make sure you use FCS fusion not the old single plugs. I've destroyed a couple of the single plugs using MR twins. I haven't damaged a fusion box yet but I have still snapped fins off at the base laying into a bottom turn. Glass ins really are the best option for a dedicated twin.
Your other option would be fin placement similar to a twinzer so you have a really tight cluster. This surfs very similar to a twin but spreads the load over four tabs instead of two. Loose as a goose like a twin but still has that quad "powerband" when you pump a little speed turn.
Even though fcs have tried to replicate the futures setup...I still think the futures would be way stronger as it has way more fin in the board.
My next board will be glass in fins
I meant to say before I can't comment on Futures as I've never used them. This is what I meant by the tight cluster. If you want more drive swap em round and put the bigger fin in the rear.
Is that a reverse set up on either side? Like a conventional on the left and you have reversed it on the right? Why is that?
Was just to illustrate the point chrispy. I usually surf with the larger fins in the front.
I have twin fins with keel and conventional fins. Both work. The keel appears faster down the line, but the conventional fin releases better out of the lip and has a tighter turn radius. I would also recommend channels, although quite shallow ones and not the full deep six. My three twinnies are all glasses in as are the four copies that have been made of one of them. And the rubbish about twinnies spinning out? Put those babies on rail and push as hard as want with your back foot. They won't budge a bit.
Bang on thedrip re drive and release in relation to keel v conventional fins and probably better explains where I was coming from in reference to swapping the from front to back. As you can see from the pic it changes the outline of the fin from a conventional outline to more of a keel shape. As to channels, concaves achieve the same result. All of my quads/quinzers have quite pronounced doubles inside a single concave through the engine room.
Plugs will work in the twinnie, you just need to add a little strength to the EPS foam. If divinycell foam is added to area the plugs are going and then the plugs are glassed in, this will provide the strength required.
Check out this web site boardlady.com/anatomy.htm and how to use composite construction techniques to add the strength
the way to go with plugs and twins is to use 3 plugs like Webber does on the Twin Fish model....the longer base of a twin puts too much stress on just 2 plugs...theres a few KEEL fins around with 3 plugs,,those bases are 6-7inches....Webbers twins have a 6inch base.no travel problems and you can make lotsa different templates for different conditions.
