Expert? Me? I'll give it a shot anyway. For a prop I'd go with the Prather 235 or some from Octura, X4447, X448, X646/3 or an X450 in a 2 or 3 blade. You may have to try a few to find the right one. That boat ought to scoot with a .46 (I assume it's an O.S.). I've got a .45 mono and that's what I have for mine to choose from.