When shipped from the factory. the left screw in each blade clamp is not adjusted properly. As the blade goes up & down, it cuts a wide path. With a tensioned blade mounted, push the blade up. I used a thin metal ruler clamped to the side of the table to just touch the blade. Now push the blade down a check the distance. You probably need to adjust the left screws to get the same clearance both up & down. LockTite on 1 of my screws doesn't hold, so I bought a longer screw & put a lock nut on it.
The "protractor" under the table is a cruel manufacturer's joke. In order to get the zero centering pin to engage anywhere close to 90 degrees, I had to replace 1 of the protractor cap screws with a longer one and add washers between the protractor (angle gauge) & the bottom of the table.
The easiest way to set the blade 90 degrees to the table is to take a block of wood (I used 1/2" X 2", on edge), & cut into it the thickness of the blade. Swing the blade around to the back of the blade. If it fits easily into the slot, you are good. If not, loosen the knob slightly and strike the edge of the table. Repeat as needed to get the perfect angle. Next I went out to end of my block, cut 1 slot, rounded the end to make it pretty and drilled a hole for hanging. I use it a lot, after each time the table has been tilted. If the block is held against the back of the blade and lines up perfectly, you are good to go. Lastly, go here:
jerry