float height
The "tit" should not be compressed. You will have to hold the carb at an angle, not completely upside down to accomplish this. The book doesn't make this very clear, it just says not to compress the "tit". From what I have read the best way to do this is to turn the carb upside down and hold it at about 45 deg. or to the point where the float tang just touches the "tit". Then make your measurement, adjust, remeasure, adjust... 'till you get it where you need it to be.
I found that it was a little quicker to make a mark where I wanted the float height to land. Then if make the adjustment until it gets to that point. This is a little quicker than adjusting and measuring everytime. Once you think it's there, measure it .