This is my first tip, hope I can help someone with this. Probably someone else had thought about this before, but I came up with it by myself... (*proud, proud* ) I built the FG Ho-IV. The problem was: When I wanted to attach the wings to the middle "fuselage" section (The Hortens were flying wings, so technically they didn't have fuselages... but you know what I mean ), I didn't know how I could press the wings against the glue tabs to get at least some counteracting force onto the glue for better contact and drying. Particularly the second wing, the one that effectively closes the whole model, prevents me from using fingers or any tools to apply counter-pressure from inside. But then I came up with the following solution: I spread the center "fuselage" section open so that the "airfoil"/wing thickness was a bit more than I wanted it to be in the end. Then, I loosely wrapped up a few paper pellets and glued them inside the joint, see the first picture. Then, I applied glue to the glue tabs, slid the wing over the tabs, and was then able to "squeeze" the glue joint against the counter-pressure that the paper pellets provided from the inside. And since I had "over-spread" the center section before, applying the pressure compressed the paper pellets down to the wing thickness I eventually wanted to achieve (more or less, that is...) The 2nd picture shows the result. It's by no means pretty (only my 2nd model, after the relatively easy FG Lilienthal Glider), but it accomplished what I had hoped for (and didn't have any other solution for). This is just my take on it... if someone else has any other ideas of how to apply pressure on glue joints from inside a closed model, I'd appreciate any inputs. Thanks!