Hi Seadogdave... another David here.. welcome to the forum.
My initial judgement on pitch was largely based on the excellent Russian Youtubes of a DF15 fitted with the different pitch props and revs/speeds recorded (see post #24 of the thread linked below).
Mine isn't run in yet so it wasn't appropriate to do speed trials but I will give my own comparison between 10" and 11" as soon as I can.
However I'm sure you would need at least an 11" if not a 12" with a light load and such an efficient hull profile. There's a guy on here who also has an Aerotec plus a Suzuki DF20 he's owned for about 3yrs. He also briefly had an Frib which has a similarly efficient hull as yours and he suffered over revving on a 10" prop with that or when lightly loaded using the Aerotec.
See his post #21 on this thread where I was asking for opinions on the Suzuki before ordering... Suzuki DF20AS 4-stroke new - Any opinions?
For our part the V hull of our SIB plus the fact we are usually two sturdy adults + teen + dog + lots of fuel + too much kit means a standard 10" is more likely to be our ideal prop.
Where are you based and where do you launch? How do you like the Ribeye?
Oh and just to be sure when you say... <<< With just two in the boat it over revs as the second crew slides back in the boat. With just one aboard it is constant.>>> do you mean it hits the rev limiter? It's not prop slip/ventilation is it?