Hello, I was just looking to see how this Xcaliber 6 shaft compares to the Maltby distance series, and Aldila NVS in a stiff flex for a driver.  I have played the NVS, but not the others.  The NVS is nice feeling, but sometimes if I go after one it gets a little loose and I end up with something high and leaking right.  I have since changed that shaft out to an original Diamana Blueboard 63 stiff and really like that a lot.  I was looking for another shaft at a cheaper price point to put into a back up driver.  Something with a standard balance point and between 60-65 grams to give a mid launch mid spin type of performance.