Today I got a question about the size of an addon aircraft in the preview window in FS, it was appearing too small. If I knew a solution? Actually I did and I had discussed it before with some other aircraft designers. The preview size is determined by the radius within the MDL file, but unfortunately there was no easy way to edit this (unless you like to attack the MDL file wit your hex editor). I have now made a small tool that allows you to tweak the radius and bounding box values of a MDL file. Enjoy and use at own risk!