We do offer a 5.5 in the PRX shaft and it weighs about 70 grams.  We have not ordered enough of the 5.5 shaft for players to give you a feedback response.  Maybe one of our TT members has tried it and can let us all know. 

I am looking for a R Flex shaft in a D2 driver that would fit my game better. Im not swinging the club as fast as I use to I really would like to know which is best for me.