I have an update to my findings:

1) The floats are straight to the fuse - I plummed a line from the CL of the floats to the CL of the fuse down the length of the fuse and it is parallel all the way down. Top of floats are level.
2) The wing looks straight with no warping or loose ultrkote.
3) Ailerons are trim flush and straight with TE of wing
4) Weighed wings and both came in @ 1# 3.8 oz exactly. Connected wings (no fuse) they balanced perfect (didn't balance cord wise)
5) Don't think I can do outside loops with a Piper Cub - at least I didn't try.
6) This was my maiden voyage and I noticed that the plane is very tail heavy. I am placing weights on the float tips to get the CG to suggested spot and I'm picking up the plane under the wing and balancing to get the main wing underside level with the ground. Is this correct?
7) Can a very tail heavy plane cause the rolling problem?

See pictures for details

Thanks for the help and keep any other info coming!