Hey thereGratulations, looks very nice. Be proud for your build, i dont know if i should trust me to do such a project!
My build is a exact copy of @prongs_386 his build. I have the exact same confuguration as in his tutorial, so i can swap software instantly when he releases new updates. I made adjustments in my configuration and included them as an add-on.
With the tutorial on github and the shopping list you will have a good start. Next is to know what you want. I know now that the options are endless, asslong as you keep the memory usage low. All works fluidly and the screens update instantly .. it is really worth it to give this project a try.