For those of you who like to do a non-destructive update the Sachesi old school non-Blitz way, I have created two ZIP files based off the AT&T 10.3.1.1016 "release" with the core OS and Radio files swapped out accordingly. I would have posted them sooner but I wanted to load the Z30 version on my Z30 to make sure it works and it looks like it is good to go.
FYI they are both links off my OneDrive account and should not require you to logon, but I have heard OneDrive tries to make you anyway so my apologies if that is the case.
Z30: http://1drv.ms/1tnCg7j
Z10: http://1drv.ms/1tnCc7A