Reefer Fuel Tanks & Traffic Barrels

While I was designing my 53' reefer, I decided to take the fuel tank and add it to Shapeways as a separate detail.  I know Trainworx makes a fuel tank, but it is a longer version.  My design is a much more common 60 gallon tank that can be found on most modern day reefer trailers.  My design comes as a 6 pack on a sprue.  They are oriented upside down for optimal printing.

Another idea that I had was a simple traffic barrel for road scenes.  I created these in a 12 pack, in clusters of 4 to a sprue.  I think these took about 5 minutes to design, but I haven't seen these in N scale before.