Hey Joachim,
the following workflow to append/update records in airtable is losely based on n8n Course Level 1. Make sure to also checkout n8n Course Level 2 to better understand how to work with data in n8n.
I did not notice your answer!
Thanks a lot for taking the time.
I gave up on n8n but seeing my make.com bill, now I’m back with a fresh install on AWS!