thanks guys for your snappy response, no pun intended.

I refered to the 2008 FAI sporting code and indeed, there was no mention wether the snaps are positive or negative for manuever#9. and perhaps, a negative snap would be a solution.

Bryan, I will still try out your suggestions for this particular plane.

By the way, I will be competing with my shinden (still in transit from the US) in our Asia regional contest and from comments i picked up from the shinden thread, i think this plane will fare out very well in the snap and spin category.