firewire type 6ft 6 ins pinny tail

i bought some sheet pu 3mm foam that i have had for a while , i decided to make a firewire type board, rather than use balsa for the rails i have used some leftover foam from and old clark green foam board that i have ,

the rails will be covered in carbon cloth , the fin plugs are surrounded by inserts of carbon to isolate the plugs from the core to minimise any water intrusion,

the core is 1 lb eps which will be vented ,