registerPreMatch(scale, series, fn(outside, inside)) {
    }
  

• support grade inputs
• use a simple, hard-to-misuse data model
• easily adjust to fit your needs

TODO: maintain historical XYZ and convey the skew to people interested in conversion
[I think i meant that storing 8A as an integer, means you can never adjust your conversions to align with other scales. 8A, must be stored a 8A.]

Do you know what your users mean?

Is a 5.10a for user#9105 the same as a 5.10- for user#803? Plain text doesn't convey the difference. Use a grade input.