Wolfmix

Hey guys either I'm missing this completely (highly possible) or there's no way to do it. Can I not rename the group letters (A,B,C, Etc) Thanks!

Not the letters itself. But you can add a word or short description like Moving Heads or Floors and such. To do that:
Select HOME / SETUP / GROUPS. Select the Group you want to edit (highlight orange) and then click on the "cursor/letter" icon in the upper right hand corner to open the Keyboard. Now give the Group a Name and store - done
Now back in the HOME screen you see your Name under the Group letter.

Ahhhh beautiful!! Thank you so much!!