B-Units

[plettb]

I have two questions about adding to / extending this library. I have a fairly niche unit called "B-Unit". In our industry, B-Units = Frequency * Frequency / 1000. So, it is related to frequency, and can be converted back and forth.

1. Should something like this be added to the codebase, or should I fork?
2. What would be the best way to implement this? I don't think I should add it as another frequency measurement, but I'd like to have a converter to/from frequency. It feels somewhat like a "partial equality". Is there anything similar already in the library that I could copy from?

Thanks!