That would be exactly why you hit the X flex so well in the 07. If it's an after factory shaft installed untipped in the TBTP then by all means tip it 1/2. Think about extending it the lost 1/2" tho, or try it at the shorter length with some lead tape to slip the Swingweight back up.
Haven't researched or measured the R9 sorry, but Goonie seems right on top of it.