Matt,

I see on the Thunder Power site that the TP730 is rated for 12C (9 Amps), with burst capability to 16C (12 Amps). That, along with knowing he rarely runs sustained WOT flight is probably the reason he gets away with it. He probably has no less that 100 cycles on that setup. Never-the-less, we'll downsize the prop to put him into a safe zone. Thanks for the head's up...

So, now I see the value in those amp/power measuring toys everyone seems to have. I assume that's the best way to test props and find the "optimum" load for a given setup. I guess I should get one of them.

You have answered all my questions (for now). Thanks so much for your expert advise. I got more in one day here than I could from three hobby shops and reading dozens on threads on the subject (or related subjects) for the past week.

I'll report my selection and outcome on the Ultrafly Extra 300 setup. I'm sure others will find this thread a usefull wealth of knowledge.

Again, many thanks Matt...

BTW: Do you work for RCU? How is it you "moderate" in th forums? Are you compensated in some way?