Hey all, I continue to learn from this mistake.

I searched the posts and didn't find any info specific to my issues so here's what I have to date.

As Dorsal pointed out the drains holes were in the tanks, I just plain missed them due to not having built the wings or done the covering (failure to read closely enough )

The wonderful tech support at PolyFiber responded today (Sunday) and indicate the solution didn't do any fabric damage .

It did blister the paint on the wing and we are now discussing options to repair the finish as well as areas for additional grommets....