Drilling The Flattened Ends - (1 and 2) Center , mark , and drill for the stainless 10-24 machine screws. The inserts can be drilled with a hand drill with the tubing still on the frame, or removed and drilled on a drill press. Use a file to round and smooth out the ends.

Cutting and fitting - ( 3 and 4) Cut the inserts to the required length. On the Sea Ranger, they are 10" to 12". Slide the inserts inside the 3/4" stringer for positioning and riveting