Yeah, the metric system is a great aid for those who have trouble with math.
Let's take an acre, for instance. A fine measurement rooted in practicality. 1 rod by ten rods. The amount of land which be ploughed by one man with a good team in day. Contrast that with a hectare. Where do the man and his team fit into that? The mental exertion required to convert fractions of inches inches into decimal measurements kept a machinist sharp. Metric measurements make him lazy.
When Canada first went metric, I actually had guys who would call up and say they needed a front sight about 7.7 mm high. I would tell them not to bother me until they knew what height they wanted. GD
