Great looking finish. Well done.
All kits seem to throw up issues in some way or another but that finish does look the goods.
In terms of TUSQ nuts, I have found that they tend to be a bit short on height. I have fitted a couple and found that I needed to shim under the nut to get rid of fret buzz. Simon's advice on shimming is the best way forward to get some height.
I also tend not to glue in nuts until I have tested the level with strings. After I feel happy with the nut and how it is sitting I place a small dot of wood glue in the middle of the slot to prevent it falling out with re-strings but it is usually easy to remove if need be.