Have recently ( Scotts Head in late June ) bought a "Jimmy Lewis Kwad". I have had a couple of great surfs on it when the swell was bigger and the beach breaks started to line up and hollow out - very fast down the line but not really that manouverable, I was thinking of
swapping it and had this partly organised when a mate said "why not take two fins out and try it as a twinnie!"
I have had two surfs in last two days in knee high to rib high surf - not real big - it f""king ripped - still got plenty of speed down the line and very manouverable - bit too loose in fact - was going to try and improve this aspect with "Mark Richards Twin Fins & nubster" - only come in FCS - what is the equivalent in FUTURES FINS?
Also checked out the vid of the new smik after trying this out and has convinced me that for my local conditions and ability level the twinnie is better value. Will try and get a picture when new setup is finalised ( new larger side fins plus new finbow for nubster )
Future fin equiv please? regards Steve

I would recommend the Al Merrick twin:
futuresfins.com/surfboard-fins/amt-twin.html

I have the FCS II version, and it is the best twin + trailer set I tried.

- the foil profile has a very thin leading edge: AM profiles have the thickest point at the rearest of all modern fins I saw. This, in my opinion give a very hydrodynamic profile with a very high top end speed.

- they have a thin tip, and generous rake, and a not too stiff construction, meaning that with a box that holds the base quite tight such as FCSII or future, the flex pattern is optimal, letting the tip "breathe" to keep a laminar flow across the turn, it will "smoothen" your turns and correct the small mistakes.

- wide base and narrow tip give some of the handling of the C-Drives: drive in turns but not stiff at speed

- the trailer works quite well: the pronounced rake stabilizes the turns, but it is small enough to stay loose.

Basically, I now use AM Twins + very small rear quads (Gerry lopez) on small wave wide tailed boards, the AM Twins and their trailer in small waves, and the "regular" AM thruster set on bigger waves.
I still use the Mark Richards twins + trailer (MR trailer or a bigger one, depending on the wave size) on my longSUP: they are slower but harder to stall, so you can noseride with a twin fin, quite fun

Note that there are other twin models at:
futuresfins.com/shop/ (check the "Twin" checkbox at the bottom right)
shapers.surf/fins-fin-systems/fins/twin-fins/

See also my experiments at:
www.seabreeze.com.au/forums/Stand-Up-Paddle/SUP/The-FCSII-system-makes-experimenting-fins-setup-a-breeze?page=1
The asymmetric trailer position is quite interesting, try it!

Thank you very much for the info!
Steve

more ideas -- personal setups?

Have you tried medium sized fronts and very small rears as a quad ...
i use this on my. 8'10 flow ..it's nice and loose now with still good drive ..does slide a little on very hard turns ..and bottom hand turns ....but yeha .at first I didn't like this board ..but with the right fins to suit me ..I'm jelling with it ...man .

I am always swapping fins around between boards and here are a few of my personal setups.

My boards are all fairly wide tails (deep minion or custom quads) so I like the Futures T1 which is the FCS MR twin fin, teamed up with a Shapers DVS 8.7mm short fin in the centre rear box.

Plenty of drive with a nice amount of hold and drive in your top and bottom turns.
If you are surfing it only as a twin it will be super loose but a bit sketchy on the bottom turn if your tail is wide. There is no right or wrong fin setup so plenty of trial and error is required to find that feeling you are searching for.
Waz

DVS small centre

Shapers S9 fronts with DVS rear centre

Futures T1

Thanks - board will be ready on Monday new finbox for small centre fin and have ordered futures -- AMT HC TWIN FIN SET --
side fins are 5.26" high and base 5.04", should be on the water next week with this different setup!
Steve

Picked these up from Shapers a couple of weeks ago, haven't had them in some great waves yet, but very happy so far, still plenty of drive, using them in a Jimmy Lewis 8'5" striker.

So they fit the futures finbox? Lived at Scotts Head and Grassy for 20 years - knew him as a young bloke to say gday to - even then he was ripping - nice kid - don't know the man - I moved to Arrawarra Headland and havn't seen him since then. Obviously still ripping!
Steve

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stehar said..
So they fit the futures finbox? Lived at Scotts Head and Grassy for 20 years - knew him as a young bloke to say gday to - even then he was ripping - nice kid - don't know the man - I moved to Arrawarra Headland and havn't seen him since then. Obviously still ripping!
Steve

You can get them in futures or fcs base.

My fave for fat arse boards

Hi all, this is is a good topic indeed !
Good combos of fins swope around here but the better way to convert a quad into a twin fin is to insert new plug between and further inside the rail from the old quatro's positions.
My opinion like shown on this quatro fin plugs with three extras plugs for the MR+trailer combo is to insert those extra plugs position of the wide and tall MR fin more inside the rail considering the taller height and wider base of the twin fin like a MR fin can be.
So the best is to see a local ding fixer and insert new FCS plugs to fit properly ( to my opinion) the MR fins.

You are right, of course, Kami.

However, due to the forces developed by big twins, I'd recommend FCSII boxes (or future) rather than the weaker traditional FCS 1 plugs. Or at least FSC fusion boxes.

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Brenno said..
My fave for fat arse boards

What's the go with these bad boys ???

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slugga said..

Brenno said..
My fave for fat arse boards

What's the go with these bad boys ???

C-Drives
Good drive off the bottom, loose off the top.
I love them. They make my minion and flow so much more fun.
I use them on fat bum boards with quad option.
Colas is better at explaining the science.
I just know they work for me.

Great job by Byron at "Madness Surfboards"! The Al Merrick Twin & nubster arrived yesterday as well. Picked up board this arvo @ 4pm.
Hopefully there will be some sort of wave to ride - been onshore and rainy for last 4 days. I now have 3 DIFFERENT sizes of side fin PLUS TWO sets of finboxes to try them in - with the Nubster in all cases . MAYBE TRY -- biggest fins in front boxes when surf is BIG. Try smallest fins in back boxes when surf is SMALL. WHAT DO YOU THINK BREEZERS? GOOD STARTING POINT?
Steve

This is a very nice quad from Jimmy Lewis. Bottom shape of board should be ok to switch it in a Twin fin. But to switch it as said my opinion is it need extra plugs to fit the Twin fin in a right position considering the wider and taller fin a Twin is. My video to illustrate what i'm writing.
Whatever a given fin solution done once the fins plugs are fit in the board, it's always a matter of feeling anyway...

Thank you -- Iwill have a few surfs on it as it is -- but your explanation and knowledge gives me the enthusiasm to add two more fin boxes if the current setup is not successful -- great input, pretty much what I want from this forum ( the breezers response )
Steve

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stehar said..
Thank you -- Iwill have a few surfs on it as it is -- but your explanation and knowledge gives me the enthusiasm to add two more fin boxes if the current setup is not successful -- great input, pretty much what I want from this forum ( the breezers response )
Steve

Thank you too. To be more exact give me the dims of actual fin position and tail. I will give back the twin fin position.

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stehar said..
knew him as a young bloke to say gday to - even then he was ripping - nice kid - don't know the man - I moved to Arrawarra Headland and havn't seen him since then. Obviously still ripping!

Asher Pacey "still ripping" is apparently quite an understatement... relax and enjoy some magic twin fin riding!

thats loose!

Have emailed dimensions to you Kami - look foward to your design - havnt had the board out in surf yet - windblown,raining,awful!
Steve - ps: maybe tomorrow some surf and pics

See your post now, I'm back home, I've been in Paris far away from my seaside and much further from "Arrawarra Headland.NSW.Australia".. You lucky man to live in this place.
I hope you some nice waves to test the board as a quad set up . I post you the new picture soon.

After reading this post i decided to try some twins in my minion.
Had it out last weekend with the new fins and i was impressed, still need to dial in my bottom turn but the top felt alot better with the twins.
Im considering riding it as a twin now. Would i be better off putting some new fin boxes in?

I think so - Kami is/was going to send me new dimensions for additional fin placement --when I get these Iwill pass them on. Been no surf - got desperate aand went out - videod it but cannot load video onto seabreeze - something about utube?
Steve - ps board went well for conditions - I didnt

I think so too. You can use your board as a pure twin in fronts with no trailer in small weak waves, but you will notice a lack of drive when waves become more than waist high, i.e., the board may seem to stop dead at the end of the bottom turn as you push on it.

You can also try the big twins in front plus 2 "nubsters" / small trailers in the rear quad boxes, it can add drive without too much "neutering" the twin fin speed and looseness, a la Glen Winton www.boardcollector.com/2008/03/mr-x-part-1.html