MDV 0% is considered one of the best methods, but it might be too slow for some. If so try MDV 100% instead. And always use the same source for your conversions to keep it consistent.
This is due to the lack of accuracy in the game, especially for games with few decimals for the sensitivity you can see quite high discrepancy numbers over 1%, but even with 6 decimals you might see a very low discrepancy in the 0.00XX range. This is nothing to worry about.