Fin box FCS fusion 3D print model

FCS fusion fin boxes. center box and outside boxes at 5deg. holes for resin to flow through adding strength. tested in surfboard. recommended to thread the screw holes or screwing in carefully on first thread. can treat inside to waterproofing (very thin coat) I used PETG and it worked well, my friend is a surfoard shaper out of florida and helped me improve designs. will upload photos soon.