My original go-box design. Now dismantled to go into my standardised modular go-kits.
The case was custom made with 9mm plywood sides held together with Aluminium bands around the top and bottom riveted to vertical Aluminium angle section. It was not square, one edge being slightly narrower, to fit neatly into my motorbike top box.
Radios were mounted with their proper mobile mounting brackets. Battery was held in with some elastic cord. Simple Paracord handles were used for carrying.