I just completed an Akrobat (75" span), a Gerry Graham design from back in the late '80s. He kitted this plane and provided a roughly framed jig build fuselage and mostly finished jig built wings. My kit lay in the barn for twenty years waiting to be built but is now flying.

Gerry used foam ribs with cap strips, which results in the lightest wing of any plane I've built.... but I gotta agree that of the foam wings I've build, they seem a slightly heavier.

btw, I scratch built a Simitar many years ago using a self cut foam wing and used cap strips and had no problems with the covering touching the cores... so I'd argue that cap stripping can be done.