Here are the cores ready to skin, the layout of the carbon tow I use to reinforce the wing (I also used this technique on the stabs as well), a skin with the PU glue all rolled out and the CF tow stuck down and finally the cores in the vac bag sitting at 9.5" of mercury for the night.

Once I get them out of the bag I'll weigh them again and post some weights.

My spars are a little different than what came in the kit. I laminated some .007" X 3/8" CF between two pieces of 1/16" balsa and thay are an inch longer. The wing panels should be plenty strong.