Simply loosen the two inner grub screws and remove the fin in a gentle, upward rocking movement, taking care not to push either corner of the fin into the underside of the surfboard.
By moving the fin towards the nose of the board increases the boards maneuverability; conversely moving the fins towards the rear of the surfboard increases the boards drive and holding power. There is an implicit trade-off between maneuverability and drive and only minor fractional adjustments (i.e. 1mm) are necessary to produce noticeable effects. Similarly by toeing in the fins towards the nose of the surfboard increases the boards maneuverability; conversely rotating the fins away from the nose and towards the rail of the surfboard increases the boards drive and holding power. Finally by increasing the fin\'s splay outwards towards the rail increases the boards maneuverability; conversely straightening the fins splay towards the centre stringer of the board increases the boards drive and holding power.
The inside screws hold the fin firmly in the desired horizontal position, whilst the outer screws fix the i-disk into the desired toe-in position.
No, but is does allow for adjustments in instances where there are manufacturing placement errors.
The fin already has a built in 6 degree splay whilst the neutral [blue] i-disc has no additional splay.
A standard stainless steel metric Allen key will fit both screws. Note that this Allen key may also be suitable for competing fin systems.