Hi!
You *could* do this, but it still won't guarantee your specified build orientation, as we might end up packing your model into the larger printer rather than the smaller ones (for which you have the x, y, z dimensions).
Additionally, it will likely slow down your model, as it will be held up in quality assurance (QA) process, to ensure that this is truly what you want to print. People have done this before, which is why I know!
It is also wasteful and , as you suspect, more expensive.
Lastly, because there is no way to specify print orientation at this time, we have excellent customer service instead. We see a LOT of models and we have a pretty good idea of which orientation will work best for printing.
Of course, if the quality of your model is not what you expect, you have 10 days to ask for a reprint or refund, just email
service@shapeways.com
Best,
Natalia