Hi Paul, yes I cured my problem by removing the aerodynamic tab and glueing it to the fin, but I have been wondering if I had mass balanced it with weight then I might have achieved the same result.
It was just that you could tape some weight on and try it with out having to cut anything.
I never tried it at the time so I don't know if that would have worked or not.
I hope you cure it. Let me know if you do and how you did it.
I wish I could remember the name of that model. Spinks Akromaster, maybe?? Not sure. Is that an aeroplane even, lol
Jim