How should the United States undergo metrification?

In my opinion, the main reason for using the metric system would be industrial. Workers with low levels of mathematical training would have their lives made easier. Of course, I'm in Canada right now, so we already use it. However, working in a welding shop this summer, I wasn't the least bit surprised to find that the US system was used, since the shop's main clients were US enterprises. So, basically, the industrial aspect of trade between the US and other countries would be made easier.

Jam it back in, in the dark.