i dunno if a blade400 has BEC or not? its all stock

i'm not doing 3d i just today starting forward flight, but the tail pointing toward me the whole time hehe
also for ugrade servos, i'm interested in the Hitec HS-65HB Micro Servo, but i'm confused, in the pics at ka-planes.com it shows three holes for mounting, with middle holes which i'm sure is need since the stock holes are in the middle. but at other websites like horizon hobby, the same servo pics show only 2 holes and not one in the middle? is their a way to add a middle hole if it don't have one? or whats are some better servos that will fit blade400 and around 25- 30 dollars