I just finished de-coring the bays between the capstrips of my Stinger 120 wing and thought that the actual weight reduction would be of interest to builders of this model. I used a "hot knife" to remove the styro foam and weighed all the foam blocks. It came to a total of 8 ounces! Since lightness seems to be an issue for this model, I think that the trouble of removing these chunks of foam is well worth the effort. Also, since there have been reports of wing failures in flight, I am installing a 3/4 inch wide carbon fiber tape on the area over the main balsa spars instead of replacing them with hard wood to keep weight down. The strip of carbon fiber will run span-wise from tip to tip upper and lower surfaces.