hey i got a goldberg hot stix 40 w/ a o.s 46ax in it, has pleanty of power and massive control surfaces.. on high rates probley 45-50deg throw yet is dosent like to hold a knife edge i got the c.g about half way between the front and rear marks.. moving it to the rear will help knife edge?? and if so how far past the rear mark can i go before it's a lawn dart ????/ to unstable to fly..thanx kind of new @ the aerobat stuff