Well no probably not, designing a machine completely in metric is not really my goal here, although I have seen some mame cabs done that way...I am more about trying to be able to discuss build techniques across both platforms without shoving Imperial down anyone's throat...Say you do a build of a control panel in mm, I can't learn from that without recalculation or even a very basic understanding of size, and consequently the other way around If I build something in inches it doesn't fit your designs or ideas, Basically I don't believe one is better than the other, they are just different, and a good builder would know and use both...Going forward I have been practicing in less critical measures as conversions, (Yes I can't get away from that) and have been getting pretty close, not perfect mind you, but close enough for a comparative understanding on less than critical.
I had to look up a "furlong" that's not something I have ever even heard of, Forget commonly used here, Although aparently it is a term of distance used in horse racing.