Solo's Response to the Missing R3 Nut (and missing screws for the String Tree): They will fix the issue ASAP! Great Company!
I bought this off of their eBay store at 3:00am... they shipped the item within 4 hours of me purchasing, which is awesome! But the String Tree was lose inside the box and did not include screws for it, and obviously the R3 Nut was missing. I'm sure it was just a slight oversight. I'm shocked that the Floyd was not shrink wrapped though and is probably the reason for the missing items.
I will be installing this Floyd (momentarily) on my Jackson Kelly KEXQ, which currently is inoperable with a Floyd Rose Special.