Has anyone seen or used any of the exhaust sets from KA Models? They look amazingly detailed. I believe they are 3D printed. Here is a link to their site (in South Korea). Check out their F-15 open and closed exhaust sets. The amount of detailing is amazing. They also make F-14A exhaust sets that look more accurate that most others I have seen (with the exception of Katran).   http://ka-models.co.kr/