The ailerons won't extend past the outer 3" or so, anyhow.
I've still got to add the trailing edge stock and wingtip blocks, too.
I could conceivably, at this point, simply slice the sheeting, (and partway through the foam)
on a diagonal, pin the edge to "level", fill the foam, repair the gap in the sheeting, install the
trailing edge and wingtip blocks, and have a nice straight wing with no curled up trailing edge.

Actually... maybe I should fix it. I've been toying with adding 2.5" each side anyhow, to get
my wing loading down even more. (from 31.4oz/in^2 to 28.8oz/in^2) (6.5lbs AUW estimated)
I could take that opportunity to add "proper" washout, I suppose... by twisting each extension's
leading edge down as it should be, and just contouring them into the existing wing as necessary.

I don't know if decreasing the loading that small amount will help... but it won't hurt
Thanks for the comments, guys.