Hello Sparky.
My opinion is copy the Top pilots in F3A ( Matt's, Janson Shulman...) . In my case I have put in my airplanes the Hacker 14XL competition with the speed controler : Acro 90 0 competition and with TP 5300. The propeller that use habitually is 22 x 12 obtaining very good results.
What airplane you wish to electrify?

Regards