Thought I'd take a stab at some home brew bomber type swimmers. My apologoes to NJT for the re-engineered lips... :-) Big ones are almost 7 " long. The smaller ones are are just over 5" long. The big ones have a belly weight right at the thickest part of the wood.
No. Those are just epoxied in place. I was thinking about that and once I get the right lip profile, I that's one way to be sure the lip doesn't fall out. Either that or some small screws.