Dynamic Delimit line

Hello,

I have been creating my own text favorites in .cel format. One of the text favorites I created is as shown below. (Station & Offset) 

Is there a way to make the Delimit (Circled in red in the image above) line, between my text, Dynamic so it adjust based on the size the text? 

I have already check out a similar query: https://communities.bentley.com/products/road___site_design/f/geopak-inroads-mx-openroads-forum/215132/placing-text-labels-with-delimit-line
But it doesn't discus much about the dynamic delimit line.