I purchased 5 of the National super boxes, only one with a problem. One of the cut outs was not done but this didn't take much to sort out with a saw and chisel. Not even worth getting in touch with Hagen's. The overall quality of the boxes was far better than I expected. Once I worked out the two main sides only had one way they could go, all others I have purchased from others they could go either way. but the fit was perfect and all have now been made and painted a nice fire engine red. one critique of the site the photo of the national super is upside down so could not tell if I needed the metal runners or the wood was cut at a slant. so you know you need the runners, you will need to get these as well. the other great thing the pieces of wood the runners go onto were perfect size just get the level with the small side pieces and the runners sit at the perfect 12mm from the top of the super. Will definitely be getting more. Cannot recommend enough great supers.