RE: Lanier Indicator advice--Please!
It doesn't take much of a pile of strapping tape to add up to a lot of weight and you will still have a wing that is too flexible. It is easy enough to draw a pair of lines 1/8" apart, or use masking tape to create guide lines. Then all you need is a razor saw and some patience to cut a trench 1/8"x3/4" right down broadway on the top of a foam wing. You could also come up with a chisel-like digging tool to help remove the waste material. Now coat a piece of spruce with some wood glue and work it into the groove. This should be enough to make a foam wing strong enough to handle 1/2A power. You don't need to even carry the spar out past 3/4 span on each wing panel, plus if you want to get fancy and save a little more weight, the spar could also lose depth as it travels outboard, so your notches in the wing would look more like ramps. A well built wing this size shouldn't weigh much more than 3 or 4 ozs fully rigged and covered.