A method for roundtrip-correction of the Molodensky transformation was described in:
A. C. Ruffhead, 2016,
The SMITSWAM method of datum transformations consisting of Standard Molodensky in two stages with applied misclosures,
Survey Review, 48:350, 376-384,
DOI: 10.1080/00396265.2016.1191748
It is simple to implement, and could be fun to try out
A method for roundtrip-correction of the Molodensky transformation was described in:
A. C. Ruffhead, 2016, The SMITSWAM method of datum transformations consisting of Standard Molodensky in two stages with applied misclosures, Survey Review, 48:350, 376-384, DOI: 10.1080/00396265.2016.1191748
It is simple to implement, and could be fun to try out