Well you see my chart it looks level enough to me. Not sure why yours is off so much. It doesn't matter which chart you use anyway. People who claim otherwise are either trying to sell your something or don't know any better. John
Of course, accuracy is highly overrated, (the drug companies would love that philosophy) consistency is worthless (pro athletes would love this being the norm) and environments that are variable are better than those that are constant. (This is why they are trying to develop a specific golf course where the hole is constantly in a state of flux.) Common sense is highly overrated as well as you can tell from some of the statements in this thread.