I have found that using larger props on lower cell counts gives a good sound on models in general. A nice low rumble with less of the typical "model" sound. Of note is the flight time. On this same motor and 18x12 prop configuration on my giant Curtiss P6E Hawk, I was getting around 5-6 minutes of flight time. I stuck to that number for these first two flights, cutting them a bit short to be safe in the event of the need for another approach (first flight). I put the first packs (X2 5800mAh 3S) on the charger and only put about 800mAh back into both packs. I thought my charger was having an issue. Then I did a quick check of the second set (X2 6000mAh 3S) and found those discharged to 75%. Not a fluke or charger issue! This clearly shows that a lighter air frame, with less drag too, is drawing significantly less current. With these numbers, I'm estimating that I could safely get 8 minutes of flying time on these packs and probably upwards of 10 minutes. I also have a 7000mAh 6S pack that could extend flight time further still! I'm VERY pleased with these numbers as it gives me more opportunity to enjoy this model.