For those of you unaware, America is one of a few countries NOT using the metric system. To me this is a pretty stupid move. The scientific community here, as well as the hospitals are on metric, but for the most part we are using US Standard (feet/inches).
What I had planned on doing with the main series was slowly converting over to metric as time passes within the series. The Five Man Midget Death Squad book is written about 200 years into the future, where I suspect the entire world will be far more unified in, among other things, measurement.