I had one of the Agri-Drain meters (GG3000) in my 143H, and I was never as happy with it as I was with my Original Slope Meter in my G. It seemed to hang up at times, and then break loose and travel further than you thought it should. The best setup that I had was a #1 mounted above a #2. Riding steeper slopes, it was easy to spot the ball in the #1, and when doing fine grading, I always had time to check the #2. I'm not sure how important it is to follow ALL of the installation instructions, but I tried. Even splitting the air bubble in half before mounting. Auxiliary attachments, tire air pressure, and cutting on one side more than the other will also influence meter accuracy. Sometimes you need to see it, and feel it with your A.S.S. (Anatomical Slope Sensor)
smoothoperator