Our wiring trays are 2" deeper than those available from Exomotive. If you plan on putting a lot into your wiring tray, especially if you're using an ECU which is taller than the Miata ECU, this is a must have.
In our shop car, we are running the OEM GM ECU for the 2004 GTO, and the ECU is too tall to fit into the tray. After talking to some other folks, we learned that we're not the only people with this issue.
Our trays are laser cut and bent by a computer controlled bender. The lid will be included, as will free shipping within the lower 48 states!