One of the problems with working with foam is making the control surface bevels. Most builders that I have seen on the Internet just use a sharp knife, either x-acto or utility knife; the kind with the break off blades. I have been having good luck using a hotwire to cut foam so I thought that I would try cutting the bevels with hotwire. I made a few hotwire guides from wooden yardsticks that I bought at Ace Hardware for 99¢. The wood is clean and straight. For the Jupiter Duck I made three. One for the elevator, one for the rudder, and one for the bottom of the vertical stabilizer. They are cut at a 45° angle. The original plans for the Duck don’t show tabs and slots for the stabilizers glue joint, but I decided to add them for strength since my Duck is going to be a 200% version. I’ll probably also add bamboo skewers to strengthen the stabilizers. In the pics below I showed the plan template in the yardstick guide to give an idea of what the relationship between them looks like. I have a couple videos in the works to actually demonstrate the process. Stay tuned.