My son broke the tip section on his custom rod and the fellow who built the rod for him repaired it in much the same way as is being described here. Inserted a piece of fibreglass, glued the sections and finished with thread wraps. Other than thread wraps with no guide or ferrule, it looks like it's part of the rod and should be there.

Seems to work just as well as the rod did before the break. All was wel lin the universe.

Jeff