Got mine today, and happy to say, NO QC issues. AAaahhh.
I LOVE THIS BIRD!. It does sag just a wee bit in fighter mode, but it's not noticeable to me. The only thing I don't like about it is that the legs don't lock into the backpack in fighter mode as tightly as the VF-1. If you hold it by the calves in fighter mode, it's fine, but if you grab it about the intakes, the calves pop out of the backpack.
The magnetic fast packs are really cool too. Although, if you like to handle your valk by the calves (as I do) the fast packs tend to slide around a little.
Overall, it rocks!