Who's built side-opening doors at the rear of their TTT?

My TTT will be mostly squarish similar to Caseydog's, but I'm thinking I'd like to put side opening doors rather than a lift-up hatch for my galley. I'm thinking I'd be able to have more storage with a rear-end that's more vertical.
Anyone out there built doors like those? Did you use piano hinges? Are they single-layer plywood, or did you build a hollow door or something different? Would you do the same again?
Thanks very much!
Anyone out there built doors like those? Did you use piano hinges? Are they single-layer plywood, or did you build a hollow door or something different? Would you do the same again?
Thanks very much!