Hi Courtney - Do you know about WF-Pro.com? @NRYN R - inactive‚ built it and it is a must-save-to-your-favorites. He actually has something that might be perfect for you. He limited it to 140 characters but you could adjust that if you need it to truly be 20.
displayname=Last Note
querysort=lastNote:entryDate
textmode=true
valueexpression=IF(LEN({lastNote}.{noteText})>140, CONCAT(SUBSTR({lastNote}.{noteText},0,139),"...(open for more) -- ", {lastNote}.{owner}.{name}," on ", {lastNote}.{entryDate}), IF(LEN({lastNote}.{noteText})>0, CONCAT({lastNote}.{noteText}," -- ", {lastNote}.{owner}.{name}," on ", {lastNote}.{entryDate})))
valueformat=HTML
Direct URL to his text mode examples: https://wf-pro.com/home/training/text-mode-examples/