[Andre Germain]

I changed the wing from a skin shell to a single layer skin and used quarter cubic filling - as expected the surface in between the inner supports is softer, but overall the strength across the span and chord, and resistance to twist are improved, and the weight has dropped from 152 to 114 grams! That's quite viable and is under my target weight. Furthermore, as I was using Minkowski smoothing to create the shell and no longer need to, the trailing edge is sharper and thinner, not round as it used to be. Smells like a winner.