Apologies for the slow reply (to Eric1084), and thanks for the spur (glebanych). Have been trying to get to time to work on my second R2 for weeks, and was planning to post what I have archived while doing that. Looks like it's still going to be a few days until I have time for my R2 project, though, so I'll work on posting new copies of the stuff you're looking for today. I believe I have everything archived that was previously attached in or linked to from the thread.
That Mega.nz link is now dead too. Attached please find:
ROOT ZTE Z835.zip [can't get this 200 MB file to upload; keeps just cancelling out about 1/3 through, with no error message; will upload a ZIP of just the DRIVERS directory in my next post, and will try again on the full version when I get my Visible Internet connection back up, in case it's a timeout ]
ROOT ZTE Z835.zip.checksums.txt
ROOT ZTE Z835.zip [browser screenshot, 2019-09-15 - mega.nz #F!ud8VwKRJ!-cJr7EJyhb1PkziNx5KvLQ].png [hmm, some issue with the forum software isn't letting this one show up in the Attachments pane, but here it is inline]
OK, here's the contents of that DRIVERS subdirectory (QDLoader HS-USB Driver.7z, ZTE_Android_USB_Driver.zip, and ZTE_V889F_V880G_V955_A2_Drivers.zip), along with a checksums file I generated for the container ZIP (would've attached those files and checksums for them individually, but the forum software refuses to deal with .7z files).