The monitor shown is just a generic 17" you can get anywhere these days.
I took the stand off so it would pack in a shoulder bag, and I keep it stashed behind the seat of the truck just in case I ever have to diagnose a problem. You can use whatever monitor you like.
So far, I haven't used a monitor anywhere but in the studio because Zendrive has been glitch free out on my gigs.
The 16 Zendrum Set Up notemaps are where the drumkit assignments take place and are instantly available.
The Battery macro screen keeps all the drums active and ready to play in the 96 cells.
The separate audio outputs allow for post mixing, effects, and eq.
Our aim was to get clean, fast analog out of the Zendrive and into a mixer/amplifier without fragile control surfaces and finicky complex software editing steps being used for onstage work environments. Certainly, you can do that but it makes more sense to create and edit at home and keep the OS "Zendrum simple" for live. It's just a computer with all the usual connections there. I've got vent panels on both sides of the rack for keeping it cool. You remove the 1U vent under the 1U patch panel to access them with any standard monitor, keyboard, mouse, usb, etc.
Yes, I'm sure we could figure out how to mount eSATA drives inside the rack. It might involve a larger case (3U) to do so. My thought was that it would be safer to pack an external separately and keep the spinning drives away from roadies with handtrucks. It also means that you can easily add whatever eSATA drive you want if it stays external. Didn't you say you already had a TB you could use?
I'll build it to your specs if need be, just like the Jolly Roger.
Thanks for asking these questions.