Clay,

I would be suspect of your balance and would get a couple other opinions. The combo of the battery pack and added weight to the rear might be too much. I prefer a nose heavy plane and then I know there will not be a snap on take off, the result of a tail heavy conditiion! I'd suggest you take it out and get that opinion before the maiden. Many of us will do that. Just recently we found a screw missing on the servo arm, elevator no less, of an experienced pilot. He was a little red faced but thankful for our pre-flight. A simple oversight but maybe saved his plane.

John