Recoded "cbc3c" to make invalid units missing, fixes #121
Recoded "cbc3b" to make invalid units missing, fixes #120
Recoded "cbc3a" to make invalid units missing, fixes #119
Recoded "cbc23c" to make invalid units missing, fixes #118
Recoded "cbc23b" to make invalid units missing, fixes #117
Recoded "cbc23a" to make invalid units missing, fixes #116
Recoded "cbc22c" to make invalid units missing, fixes #115
Recoded "cbc22b" to make invalid units missing, fixes #114
Recoded "cbc21c" to make invalid units missing, fixes #113
Recoded "cbc21b" to make invalid units missing, fixes #112