take a picture of the refurb 3ds and the shipping label (blur/black out your address and name) that shows that it was shipped from Nintendo/one of their warehouses.
The reason I mention this is that for all we know, your lying for some reason (being a Nintendo employee,someone against piracy, or any any other reason)
I find it hard to believe they would send out 4.5 ones knowing 4.5 is exactly where you want to be to run the Gateway. that would be a bad move on their part (good for us tho)