kitesurf fins

thingiverse

I'm trying to design a kiteboard. The neutral one is the one with the insertable pin that clicks into place. The other has a recessed pin. I need a M5 stainless steel screw. Can I print it with 30% infill or any fill density? I should set the printer to stop at 7.9mm and then insert the pins. Then, resin externally. Also, I'd like to try printing the Pinna Slingshot Dado Resin file empty, and then filling it with resin and finding a way to lock the pins in place.