It is a decent plane. However to stop the flat spinning, you would need to get the CoM and CoL more closer together (mentioned in the tutorial, centre of mass and centre of lift). Also, (if I'm wrong someone correct me) your thrust is to far forward. This tends to make the plane flip endlessly, however this doesn't happen to your plane which is lucky.
Congrats on fixing it xD
Didn't even think of checking the wings after I looked at the CoM and CoL :/
It is a decent plane. However to stop the flat spinning, you would need to get the CoM and CoL more closer together (mentioned in the tutorial, centre of mass and centre of lift). Also, (if I'm wrong someone correct me) your thrust is to far forward. This tends to make the plane flip endlessly, however this doesn't happen to your plane which is lucky.
Best of luck :)
Why so soon? :(