Looks good! Z sccale model impressive.
I really believe this will eventually transform the hobby. fabathome.org
At work we are looking at new high def RP machines. Not a huge build envelope, but higher than dental/jewellery machines. The test file, unfortunately not related to railways, was very impressive indeed. These have very fine +/- 125micron detail and a variety of materials, including wax based for investment casting (what we will be using it for). Won't mention brand, but I believe that shapeways are looking at adding one to their services.
Simon