Why do custom club builders insist that the graphite shafts in Titleist and other brand name drivers are counterfeit? I have read on several websites and also viewed a video on Youtube that says the shafts aren't the true aftermarket shafts that their labeling implies. I purchased a new Titleist 910D2 driver with a Mitsubishi Diamana Ka'ili shaft in it. One of the reasons I was willing to pay $400 is because of the cost of that shaft. One thing I find disturbing is that Mitsubishi claims on their website that their shafts are manufactured in Japan and the label on my new driver says that the head and shaft were manufactured in China, so what gives here? Thanks.