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?