Hi All,
WRT this other post, I've decided to go with In-DB connections using (.indbc) connections instead of standard Input and Output nodes (see first image). I'll go ahead and indicate this on that post and close it if I can.
What's happening now is that I'm getting an "Error finding connection" error (see second image below) after publishing this workflow to Server. I don't think it's an issue with the workflow finding the (.indbc) file, but don't understand enough about (.indbc) connections to confirm.
The dynamic replace of the initial DB connection setting is working fine, since the file noted in the error message (DEV_RULES.indbc) is the right one to use. I've also verified that this file is in the correct path on the server, and is the same as in my local environment, with the correct connection info.
Any assistance is greatly appreciated.

