With my modified file open and using the oem calibration as the comparison I seem to have found a minor bug.
For example (TCC base table).
Hit control C to copy a single cell value and paste into the same cell in the modified file. The pasted value is similar, but slightly different than the original value (e.g. 4.80 might end up as 4.73). Same level of precision/decimal places .........definitely ending up with slightly different values.