A fix to a plane mentioned in this thread: https://www.simpleplanes.com/Forums/View/206168/Why-am-I-so-bad-at-this-game?showUpvotes=true ----- Also craft file here: http://www.simpleplanes.com/a/fF6s03/Mystic-Dragon-Jet ----- I suceeded in making it more stable, as far as I can tell. Unfortunately, the original design wanted to use jets mounted under the wing. I found this to be impossible.
Hope this helps

Minor Changes:
-made ailerons smaller for less rigid rolls and moved them outwards a bit
-mounted the engines directly to the fuselage and placed the wings on the engines to move the center of thrust/mass/lift to be all in line: Should be a lot more stable.