Dear all. im a bit new in this business but i managed to build some experience in the past 2 years. right now i am truing to build a new X8 with the following configuration CWS frame with 900MM motor to motor DJI flight controller 8x 40amp Turnigy Plush ESC 8x T-motor 3508-16 kv700 untill here everything is pretty ok and regular, this configuration always ran on 4s batteries with 12x5.5 CF propellers. the trick i want to apply and im not sure if it will work i want to reduce the battery power to 3s packs and step up the propellers to 15x5.5 or even 16x5.5 the Ecalc website shows a stable result when i ran the numbers. but i thought before i embark on such an adventure i must ask for advice. now comes the second question is about T-motor 4014 400kv, the same site Ecalc.ch shows that this motor cant handle a combination of 6S and 17x5.5 without getting too hot. the T-motor website says it can handle it http://www.rctigermotor.com/html/2013/Navigator_0910/40.html hopefully someone have some idea and can shed some light on that issue. Thanks alot in advance for this help.