I agree with SVFlier, I have the Giant Stinger with a Brison 4.2. It's a 20 pound baby when lite on the throttle, but when you firewall it, it's a unlimited verticle maniac. I'm not sure about the smaller stinger but would guess it's the same thing with the proper motor. The four star is a good aircraft, but is more of a floater not a "go where pointed" flyer. This floater type is what seems your wanting to get away from on your trainer. But the stinger can float in on landings, but is more of a "go where pointed".

just my .02 worth
rich