Has anyone had any issue with swing weight in regards to PXi 5.0 shafts? I recently got the 714 MBs with the PXi 5.0 shafts but felt I kept flipping my hands too soon. I dropped four 4 gram weights down the shaft until I could finally feel some lag and wound up with16 grams of extra weight in the head. The ball seemed to explode off the face and now goes straighter than ever. Any similar encounters with too little swing weight?