Does anyone have good ideas for finding the leak location?  I'm still building.

Soapy water is fine except on vertical surfaces where it runs off too fast.  Moreover a larger leak will not blow bubbles but will blow the water off in a small jet that is too small to detect.

The way to improve your lead detection is to spray soapy water on the surface, then put Glad Wrap over the surface, sticking it to the wing surface with the water tension.  Leaks now show as bubbles that form (sometimes very slowly) under the Glad Wrap.  It is a particularly valuable technique for vertical services like wing leading edges.

Fred Moreno