Prop_Washer2,
Make sure your C/G is correct. My World Models F-82 came out nose heavy with two Fox .50's. I would suggest either vertical or side mount your engines. I put mine in inverted...and it was a real !#$% problem keeping both engines running. I also used two receivers and two battery packs for the first flights and when I changed over to smaller engines...I went with two reveivers. You will not believe all the wires you will have going from one wing to the fuse with just one receiver. I also used two servo's for the elevator, and you may want to consider this. You will have five or more servo leads going from one side of you P-82 to the other. and I was surprised at the weight of all the servo extensions. It's a big model...it fly's up a storm...very predictable with no bad habits, and has a great presents in the air. Your going to love it.
Do keep us posted and send us detaled pictures of your build.
Soft landings always,
Bobby of Maui