Thanks for reminding me to get the windows tinted. It's been on the to do list for some time, but something always comes up and I forget to schedule an appointment.
I have about 4 coats of Z5 and 1 coat of Z2 since taking delivery in March. I have plenty of Z7 and Z6 on it. I didn't realize I was using the new Z5 until a couple of months ago when it was mentioned on this site. Now that I'm using the new Z5, I won't be using the Z2 that often.