This has appeared in the TT trams Shapeways shop, following a dialogue I had with the designer a couple of months back. It is offered in a range of scales.  I have purchased one for evaluation for use on my modern N Grand Central layout. I seem to recall that commercial producers have struggled to get a 5 car "snake" with only 3 bogies to work convincingly in a straight line, so I may be looking for some engineering input to get it rolling. Right now I am thinking of separate centre conduit made