I too had pondered this question when I got my Hybrid TS from Grizzly. The manual doesn't require it to be used to check the alignment of the TS. A pencil and miter gauge or a simple adjustable square works just as well if not better.
***Please fill in your profile, at least your location. As this will help us help you better.***
"Whether active duty, retired, national guard or reserve - is someone who, at one point in their life, wrote a blank check made payable to "The United States of America", for an amount of "up to and including my life". That is HONOR, and there are way too many people in this country who no longer understand it." -Author Unknown