8 3/4" sure-grip swap and rebuild questions

Figured I'd bring back this thread just to give an update. After moving and getting settled in (as well as other maintenance and upgrade projects on my Duster) I finally got around to pulling the 3rd member back out as I needed to change the gear oil after the first 500 break-in miles. I checked the backlash and it was at .009"; I opened it up to .010" and filled it back up with fresh conventional 80W-90 oil and limited-slip additive. Noise has not changed, it still has a mild-to-moderate whine that is worst around 65-70 MPH (gets quieter above and below those speeds). For now I'm just going to deal with the noise as I don't cruise on the highway as much with these gears. Later on when I finally swap in a TKX trans and start to do more highway cruising with the overdrive I might dive back in and adjust the pinion depth but I'm inclined to just get a higher-quality ring and pinion and try again. I've been finding more than a few reviews all over the web posted within a few years of when I bought mine (2017) of people saying they could not get their Motive gears quiet no matter what they did, usually mentioning that they have experience putting together rear ends and have successfully swapped new ring & pinion sets in the past that didn't make noise. Maybe I just got unlucky with a bad batch but I'm not inclined to take a chance with that brand again.