<<...there is no substitute for flying...>>

Agreed. If you had read my posts thoroughly, you would see that's what I do; fly each prop to see how it performs. I do a static rpm test on the ground, but that is just for comparison purposes.

I might try an APC 13x4W down the road, if the opportunity presents itself, but at twelve bucks a pop (five bucks for the woodies) I'm about burned out buying props.

Master AirScrew composite props suck because they flex so much. You can watch one flexing when you rapidly alter throttle setting. Cut one open, and you'll find big holes (air pockets).

The DynaThrust 13x6 on my SE right now seems to be doing okay. It is as stiff as the APCs I've tried.

I'll eventually settle on something...