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No mounting pigs, pegs, or holes. This is blank for a reason. Because every truck model out there would require a unique way to mount it. So I'm leaving that to you to sort out.
Only now in this file, you get 2. We choose to do this instead of changing the original model, for serveral reasons. Someone might one want the 1. And the printing success rate.
No price difference what so ever. There is now a pair of 2.5mm long, 2mm diameter spur posts holding the them together. This is strictly for production purposes. So Shapeways doesn't loose one of them. They are not intended as mounting posts to trucks. Hence the location of the posts.