I work my recipes out myself. The gravity is within my margins. Do I need to know it to two decimal places. Nope.
It was a serious point and for the reason you mention I don't use it for mash temps![]()
Do you know what you are saying? You have got it right but wrong you need to know the SG to THREE decimal places! For example a gravity of 1.044 to two decimal places is 1.04 the difference between the two interms of ABV finishing at 1.010 is the difference between 4.46 % and 3.96 % abv that is significant in my opinion.