Condition based replacements of Cells with other values

Not sure why you need to replace - could not just reverse the logic of your summary calcs ?

If you need to replace then it would be best to first run an Edit -> Replace for each value (1 to 5 [ignoring 3]) replacing the digit with a separate character: eg 1 to @ and 2 to ^ etc...

Once complete run a subsequent Edit -> Replace for each value converting @ to 5, ^ to 4 etc...

(avoid using *, ~, ? characters)