I can't comment on the banzai shaft,but i had a 510TP and a R7 Quad TP,both had the Fuji 757 Speeder shaft.Very very good shafts,but they play stiffer than the rating suggests,reg plays stiff,and stiff is more like Xstiff.
My swing is about 107mph and quite smooth and steady,and i don't think my swing suited the speeder to be honest,and would be more suited to somebody who's a bit more agressive.
A mate had the same club as me,but had a Fuji Vista pro shaft in his,it felt much more user friendly,and less boardy than the speeder.
Fujikura Shafts | Golf Monthly
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