I am building a plane from scratch. the plans call for four .15 to .25 glow-plug motors. I want to change it to brushless motors. It uses 9 x 5 3-blade props and has a flight weight of almost 20 lbs. I have seen wiring with two motors on one ESC and two flight battery's and also have seen were each motor has its own ESC with two batterys. which is better?