i don't think i need stl's permision, all inned to do is put a sticker on my planes so that he knows i didn't copy his planes. or aerofly pro's. it's a free model. we are making them for free. i will post pics of me building all of the models. so that no one can come against me that i stole them from aerofly pro deluxe. or any other sim. here are some pics of the new tensor 4d that i will finish tomorrow morning. ryan