I'll tell you what I said when people were having their Funtana 90's blowing up in mid-air...

You're building a Ballerina. When it's done, it will be light and agile... And Fragile!

If you ask a Ballerina to play pro football, something's gonna break!

Now, you COULD add some carbon fiber strips to both sides of the wing, and a few other strategic places, but for the most part, the lighter you build, the weaker the structure.

And you can use polyurethane to fuelproof, but thinned down epoxy will be just as light really.