hi jim looks good, but maybe also explain what you did, i assume you used blend edge?
i made now only one step replacing this cramped surface in the middle. to get there you have to rebuild the two surfaces which i replaced with the purple surface in my file to one surface to get a matchable edge. then use edge surface, rebuild it to a lower number something like 5/5 by degree 3 and use MatchSrf with the option Multiple Matches.
to make this hair brush really well tangential to each surface you should start completely different, not using curves which are actually not tangential to each surface.
BrushPong.3dm (349.9 KB)