Can I Add an Extra Column to my Fluid Engine Grid?

Hello, is it possible to add an additional column to the Fluid Engine grid? I would like to have three 1:1 aspect ratio square text blocks on this page, but I can't center the middle one, and with one space between each text block I'm left with a misaligned layout. I'm open to any solutions you guys might have for this, and thank you for your help!

I have the exact same question / issue.  I hope someone replies.

I am having the same problem! Will return if I find a solution...

This has to be solved!