Ive been reading and studying the manuals and have found 90% of all the graphs for the 737-800 <--the model I like to fly, weights are in kg, m, in meters (in the metric system) not in feet and LBS etc. Why is this? The 900 seems to have both. Just seems odd and a hit and miss on the graphs. Any discussion about this or just a known fact and people just have to sit here and convert over to metric system when needed?