I literally just did this. I followed the instructions here. I just did the front, loosen one and tighten the other and then the same for the back. I only had to do one side. I turned small amounts; maybe 1/8 of a rotation for each bolt probably less, then tested again. Then another < 1/8. I’d say I did less than 1/4 rotation for each bolt.
Thank you for responding. My specific question is whether you were able to do this without loosening the two topmost screws that hold the tube in place, not the top two tramming screws.