Hi skipper, well it's hard to see what you're really shooting for here - the red pieces in your file have an abrupt opening here where things are trying to suddenly shift from concave to convex all in one spot. I'm not really sure how you'd fill that part in.

For getting the other parts of the cylinder and wing to connect smoothly you can use Edit > Trim with the "Add trim points" option to cut the wing edge to leave you with some edges to blend between, see attached file.

But I don't really see a good way to fill in the transition from your front rounded tip to those blends, there is a lot of stuff happening in too tight of an area, with a shift from concave to convex and pointy corners, and also the flat planar front to the cylinder as well.

- Michael