I ripped the dust cover off and added 3 new frame stretchers made from 2x8 construction lumber (and tied other loose joints back together) and its done pretty well since then:
https://imgur.com/a/bqlLgW3 (wish I'd gotten a few more pictures, but I was tired by this point). Just shocking how terrible the construction is.
The whole thing is just stapled together OSB.
I ripped the dust cover off and added 3 new frame stretchers made from 2x8 construction lumber (and tied other loose joints back together) and its done pretty well since then: https://imgur.com/a/bqlLgW3 (wish I'd gotten a few more pictures, but I was tired by this point). Just shocking how terrible the construction is.