I am rather certain that really good models are made not by modelers who don't have goofs, but those that are smarter than the rest of us at fixing them! Carry on, GM! I recently had something inside a canopy, a lot of dust, really. I fixed it by drilling a hole in the side of the cockpit and then I stuck my air nozzle in it and blew the dust to kingdom come. Very satisfying, and the small hole can not be seen after filling and painting. Of course, sometimes these kinds of operations CAN go horribly wrong, but there is always another kit, right?