Revert "Corrected grid designations from 7 to 4"

This reverts commit 39d0dba18bb8d035c92d234da3425c4214093e42.
Revert "Revert "Corrected grid designations from 7 to 4""

This reverts commit 98aabf1addc662557662b05100a08215e1486a0e.