Step 1:Start by loosening your twin tab fin screws with a fin key

Step 2:Identify each fin and its required location. The centre fin should sit up straight whilst the side fins should taper slightly towards the rail

Step 3:Insert the fin into the twin tab whilst ensuring both tabs locate simultaneously. Avoid inserting the fin in on a angle.

Step 4:Tighten fin screws for a firm fit. Do not over tighten fin screws. Over tightening can cause the screw tip to strip in addition to the thread.