I suspect like Jim that it can be trimmed out. In any event, it's a little late to do much else. If it makes you feel any better, I built a Royal B-25 years ago, was a built up wing, but I ended up with one wing tip at -1 1/2 deg. and the other tip at +1 1/2 deg., for a total of 3 deg. from tip to tip. I was expecting the worst when I test flew it, but it took suprisingly little aileron trim to correct it. At least you know about it ahead of time and will be ready for it on take off.
Personally, I always have someone standing beside me in case I need a lot of trim adjustments. Becomes hard to find the trim tabs sometimes when you are busy trying to maintain control. Fortunately, I haven't needed much help at it, but it's nice insurance to have.
I built a Sterling Citabria a couple years ago, and somehow got the wing so twisted that it was VERY obvious. You didn't need an incidence meter to see it, you could see it plainly with the eye. We decided to give it a whirl anyway just to see what was going to happen. Between me trying to keep it in the air long enough for my son to get the necessary trims adjusted, we did manage to get it flying, but only if you stayed with it on the controls full time. It was so bad that it was just "crabbing" through the sky. We only flew it twice, that was enough!
Randy