Value Hobby have been selling G-Force motors forever and I have them on my everyday [weekend] flyers with tremendous success. They stand behind their products and run their own spec/tests posting the results & suggestions. Just ordered their 4250 - 800kv and using a 4s lipo spinning a 13inch prop. I need to modify the nose to make a top mount battery compartment. The esc will be a Skywalker 80amp. I actually have 4 rolls of Monocoat, 2 red, 2 yellow. I must say the arf Uproar with 2 pc wings makes for a ton more space in the fuse to stuff a 4000mah pack.. Not building balsa anymore ,this is just laying around. I am loving building Quads and flying FPV. Hears the club field and me chasing a few warbirds around with a 7inch TBS Source v4 and SpeedyBee stack.