M_Boats: installing cam cleats for jib sheets

Hello Everyone, The jib sheet clamcleats that came with my M15 is worn. I'd like to replace them with cam cleats. I want to know how to remove the old clam cleat holes and put in new ones for the cam cleats. The clam cleats are oriented vertically whereas the cam cleats are arranged horizontally. What do you suggest I use to fill the clam cleat holes? I see both fiberglass fix kit and epoxy kit. Should I use the fiberglass stuff or should I use the epoxy stuff? Or something else? Also, I have never worked fiberglass before so I don't know how they behave when drilled. How should I put in the new screw holes for the cam cleats? Thanks! Donglai M15 #612