Your Sting Ray sounds about like mine. A buddy gave it to me to test engines in. Mine has a little dihedral so it rolls out in knife edge and you have to hold aileron. I did clip one rib off each side so it rolls better. It might be a tad nose heavy.

It's not a bad flying plane. I would like 2 aileron servos, but it's still a good test plane. Does a fair flat spin. Needs more rudder.

I have had a Thunder Tiger .46, Magnum .61 4-stroke and lastly a Magnum .52XLS 2 stroke. Your Ray with the Irvine .53 probably goes up like mine, straight up out of sight. A few more flights and the engine goes in an Extreme 330.

Next time I get it out, I'll measure the incidence. Right now my work bench is covered. E-mail me at [email protected].

The photo is when I had the Magnum .61 4s in it. Yes, that's the throttle servo stuck in the top block. "There ain't no way" to go from a 2s to a 4s throttle pushrod gracefully and I did it on a Friday night.