Well, I finally got my riving knife aligned properly, or acceptably I would say. It's not *perfect* but it's perfect enough. Fiddling a bit more had the risk of setting it out of whack again. It literally took hours! If it comes already acceptably aligned on your saw then it's not the right time to be an ultra-perfectionist because it's a real pain to do. you wouldn't believe that when you read the 2 lines about it in the manual...
Mine was causing the guard to rest on the table at a very visible angle so it obviously had to be fixed.
The manual tells you very casually to just use the bolts to align the splitter bracket, as well as check its squareness to the table as part of the install procedure *before* installing the blade. That's wrong. Because you need to align the splitter to the blade, the blade has to be fitted first so you can check its squareness to the table. That allows you to set the 90 degree stop at 90 degrees.
In my case, I just used a bevel box and checked the angle of the blade at the 90 degree stop, and it was 90.1 degrees, and I used that for the riving knife.
The procedure calls for using a ruler to simply align the riving knife bracket to the blade harbor. That doesn't work in my opinion as those surfaces are too small to be a good reference. Instead I mounted the riving knife on its bracket and just frequently checked its position by mounting the blade and checked respective alignment,
Pretty labour intensive. Next stop...checking square on the fence and setting the scale. I think blade alignment to the table is good enough as I don't have a dial to measure.