dinamy,use what you have.I bought my flip when they came out. HP .61 gold cup,apc 12.25 hitec 425 on the tail, 3003 on ail.And the flip its been thru heck and back and the servos still kicking,Oh well Ireplaced a gear set on rudder, left the rudder on the ground doing tr. By the way I use c f rod on all my models.