Hi,
Models look really good, I make cardboard models of all sorts of stuff.
Can I suggest you solder in an IC socket or a couple of header strips to plug the 595 into.
Less heat stress on the board.
Tom... 
One of my model railway themed models, I have a Nano controlling the welder flashes and the dodgey electrics making the office lights flicker when the weld arcs up.
(Turn the volume down, the kids making noise with the dogs in the background :))
