Great opportunity to learn a new tool! Also, a good reminder for me to review the variety of functions provided by the Formula Tool, which alone could have done the job of my "Formula + Data Cleansing" combo.
This worked, but I'm not so sure about the approach. I matched the name, but it feels a little clunky and I didn't try to make the field characteristics the same (other than the name). Looking forward to seeing other solutions, and I did learn a new tool that I didn't know existed.
[EDIT: Looks like this is the common solution - yay me!]