What was really interesting to me-- was the airflow to/from the prop-- on a twin boom pusher design I tried in two different sizes.
the fuselage pods were smooth 10-1 teardrops and on c/l of wing - so airflow to ptop,was about as smooth as I could do it

the downstream flow in both cases was from prop tips - -inward to a small spiral -just like water going down a drain. I held a piece of string in front -above and downstream and watched it's angle to determine the airflow - a poor man's windy tunnel . seemed accurate to me .
Rather than fret on prop blade design --I now try to get smoothest path to /from prop. see picture of EDGE
I really think that makes more difference than typically supposed and based on peformance of the model I will persue this approach.