The 7mm narrow gauge project is go. Basic tray baseboard complete, fascia, backboard and fiddly internal supports to go. With the points built and 8-9 items of rolling stock already in the cupboard, this should in theory be reasonably quick to get done.
Board is 6mm MDF 45" x12", i.e. a standard unit, the same as Edge, Rhiw and Svanda.