Looking good!
I would say there was one or two areas of shadowing in the whites, which is the previous white area on zone 1 showing through the newly applied whites & they do look a tad thick in zone 1, so this would really help.
Fab smiles btw!
To avoid this, make sure you remove as much white from zone 1 as possible during your rebalance filing routine, this should avoid this happening.
I used to suffer with exactly this too.