Yup, exactly, pull the whole thing apart, sand down any "gobbs" of epoxy, etc... Don't be afraid to cut some covering away to get at things, you can easily patch it up with a roll or two of ultracoat... The tri-stock will go in the corners... Make sure you use at least 30 minute epoxy... I've seen some people read instructions and use 5 minute epoxy instead of 30 in places like this... The 30 minute epoxy isn't to give you more time, it's to give the epoxy more time to soak into the wood so it gets a better grip! Just make sure your horizontal and vertical stabilizer (the horizonal stab is where your elevator attaches and the vertical stab is where your rudder attaches) are exactly 90 degrees to each other... Also make sure when you glue the horizontal stab back you have it exactly in the middle and that it is square with the wing... Measure from the trailing edge of the wing tip to the leading edge of the stab tip on both sides... the measurement should be exactly the same...