I am the new owner of a Fanatic Allwave 9' 10". Volume is great for big bloke (I think you 100kg guys are small) and after one session I think the board is very stable.
I don't like the fin setup and as I have futures fins from my previous board so am moving back to my preferred fin arrangement.
The problem is that the centre finbox is a US inbox. I didn't realise that this box is deeper than the standard surfboard finboxes. The brass lug is lower and there is about a 3mm packing that makes the base deeper in the box.
So where do you get aftermarket fins for such a inbox? Alternatively, is there an easy fix to allow aftermarket fins fit this deep box?
Grab some deckpad offcut and cut to the width of fin base then stick to underside of fin. Couple pics of this below, u can see on the Pioli centre I stuck on 2 thick at front of fin as deckpad bits squash when fin screw is tightened.
Another quick fixit I have used when nothing else around is rolling up electrical tape to just a bit more than the thickness of lug on base of deeper stock fin and fitting under front of fin before tightening.
Bit "backyard billy" but easier than modifying fin plus then the fin can still be used on regular Futures style fin boxes in other boards.
Probably need to use the screw and plate off the stock fin that came with board as others can be a bit short.
Thanks Tryfan,
I will have a go tomorrow.
One other thing... The metal lug seems to be lower. The futures cutaway centre fin I want to use sits about 4mm below the deck level. I read on the net that conversions from US fin box to "normal" inboxes meant removing the metal lug and drilling higher... Is the reverse needed to be done in my case? My thoughts are to just suck it up and have the fin 4mm lower at the back. I end up with a box bearing point on the fin surface rather on the fin base.
At least my futures side fins fit without any problem.
It is a not a US finbox. It is a windsurf finbox.
The only difference between windsurf and surf, is 3mm deeper for windsurfing (more strength).
I don't get why you care. surf fins fit just fine. Sure the tab sinks 3mm deeper into the box, but who cares really.
Or buy windsurf fins priced at twice what surf fins sell for. 
BTW, to install a windsurf fin in a surf box, you just cut that tab off the bottom of the fin.
Select to expand quoteLordRumpunc said..
Alternatively, is there an easy fix to allow aftermarket fins fit this deep box?
Longer fin screw and/or thicker plate.
FWIW...there are seven "US fin boxes" in my quiver and no two of them are exactly the same. Keeping track of home-brew shims & different screw/plate/fin combos goes with the territory.
Select to expand quoteNC Surfer said..
It is a not a US finbox. It is a windsurf finbox.
The only difference between windsurf and surf, is 3mm deeper for windsurfing (more strength).
I don't get why you care. surf fins fit just fine. Sure the tab sinks 3mm deeper into the box, but who cares really.
Or buy windsurf fins priced at twice what surf fins sell for.
BTW, to install a windsurf fin in a surf box, you just cut that tab off the bottom of the fin.
YEs, you right because fin base don't have to stick to underside of fin. Just grind fom the bottom the height of glass between the plate and under the bolt head position.
This is the plate pulled up by the screw which anchor the fin in the groove of the rail boxe.
You right too, when say to take off the tab , if not you can crack the bottom of the USbox .
