I am comparing machine specs. I know this has been talked about before, but I still do not completely understand. Machine #1: Max bucket dig force: 15,311. Machine #1:Max arm dig force: 7507. Machine #2: Max bucket dig force:10,900. Machine #2: Max arm dig force: 8150. So for me alot of questions arise: Is there a formula to calculate these two numbers to come to a variable to fairly compare different machines? Is there a universally accepted method to calculate bucket dig force or do different manufacturers calc it differently? I am trying to level the playing field here on the published spec sheets from different manufacturers and have not been able to get the straight scoop.