well I made one. (Need to realign one of the doors). To my way of thinking it could be too big but without doubt will take 2 terriers. When finished it' s going to be coloured 'Old Walnut'. Something else I've noticed, the hinges could do with bolting. Stop the evil gits getting in. This project took an 8' X 4'  9mm ply, two runs of oak, goodness knows how many screws which all went in with the screwdriver, copious amounts of sanding and of course the colouring. To be honest, singles, doubles, trebles and the double with central toolbox would be easily achieved. I think I know where this one's