So everywhere I find these...?

0.572900 * X + 0.000000
0.546875 * X
0.588235 * X + 0.000000
0.546875 * X + 0.000000

Should be... ?
0.750000 * X -40.000000

Then just use whatever came stock value and wing it up or down?

Besides AD counts I Also found some reference to Inverse AD counts, no wonder there's so many conversions? No wonder this has always confused me...