I do not remember the exact number, but it was around 3 degrees. Zenith said to only adjust in increments of 1 degree. I made my first 1 degree adjustment by lowering the front HT support. I did not notice much of a difference. I could not go any lower on the front side so I then raised the rear end of the HT to make about a 2 degree change. That pretty much did it for me.
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