Sorry but i have to throw this in about hobby zone planes. I have an Aerobird (pre challenger) and for hand launching all i have to do is pratically hold it up and let go with a very little toss. Also if you want more control when gliding or under power move your control lines down to the bottom hole. If that doesnt satisfy you drill another hole below it (see pic--dont use very bottom hole-to hard for servo to pull under stress) I cant believe what a difference it made. and now when i have the power off and am gliding it flies like the standard config. under power. Hope this helps.

-John