The FCS II Plug System in two colours and three degrees of rail box cant.
FCS II (FCS2) Surfboard Fin Box — Greenlight Surf Co.
FCS II Plugs & Installation Kit - YouTube
FCS Fusion Fin Box Repair Part 1 - YouTube
FCSII Fin Boxes 3° Set (2) - Foam E-Z, The Original One-Stop Surfboard Supply Shop
Broken Futures Fin Box Repair - YouTube
Fin Box Repair Advice? Can I repair this without replacing it? Or is that asking for more trouble? (details in comments) And no, Solarez did NOT work. : r/surfing
FCS Fin Box Repair — Surf Dayton
New fin box needed for repair or reuse existing? : r/surfing
FCS Fusion Finbox Repair Part 2 - YouTube
Fin Plugs — Jungle Surf Store
FCSII Fin Boxes 3° Set (2) - Foam E-Z, The Original One-Stop Surfboard Supply Shop