Yes, though I think selling 100 Gn15 wagon bodies a week might be a bit optimistic !
It would not be hard to produce more - simply buy more than 1 machine, it was only £450 so it would not cost a fortune to have a factory producing 500 wagons a week!
It has the advantage it has it's own built in computer, so does not need to connected while you print - just stick an SD card in it preloaded with the print definition file for the object.
I'm just making a few mods to the printer at the moment, to try to make it print more reliably - I'm currently only getting 50% ok at the moment, though most fail in the first couple of mins luckily - it's still a long way from being a plug an' play technology.
Next task will be trying to print the chassis.
The Shapeways Gn15 wagons arrived today - will try and get them coloured tomorrow and get some pics when they dry.
Here is a sneak preview of them in their natural white

Tom
To know the meaning of life you need not to be dealt a good hand, but rather to play the worthless hand you have been dealt to the best of your ability.