....good point and good question. I balanced the old board against the new board as best I could, but I didn't have any really ideal method to compare the two. They are close, but how close is close enough when it comes to wing loading? (Can't say I know too much about that)

In a previous post you caught my interest, when you wrote:

"However you are still dealing with an undercambered wing which will resist inverted flight. Also, since it is foam and not supported to accept aileron input, you will have to reinforce or replace it with a stiffer wing, otherwise it will flex a lot when you give it aileron input."

Would you explain " undercambered wing" for me? I'd like to know what you mean. While my modified bird doesn't use Aileron's, I am using Elevonmixing in my radio, which is an elevator function blended with ailerons. You caught my interest when you said "it will flex a lot when you give it aileron input"......how true..... it flexes all the way to the point of folding straight up!! (With the new fishing line strut, it flies pretty awesome, for a weird, one of a kind plane.)