DucktileMedia
Drone Enthusiast
OS has been the king for gas engines ever since I have been around. I never hear anyone using their brushless motors/esc's for multis though. I know they are expensive but if they are more reliable then it is worth it.
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXBHEN
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXBYTW&P=M
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXBHEN
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXBYTW&P=M