I have what I've been told is a Great Planes 75 electric motor that is set up with a 8X4 prop. I plan to use a 6 cell NiCad pack to power an old timer that will weigh about 40 oz. Does sound like a reasonable set-up for a beginer? The wing loading is 9.0 oz./sq. ft. Also, I'm looking for an ESC with BEC and about 20amp capacity. Can you suggest a brand and source? Is this something I might find in the classified adds given the run of the mill specs? I'm trying to get started with electrics and have not found a comprehensive guide to motor sizing. What is the significance of the numbers associated with the motors I see advertised?