Either way - I ordered bracket with roller (will reuse my spring) and new leather belt. I'd love this machine to be 'original'

Not sure how much more I can do while waiting for the parts. I am assuming that my speed variations were due to the roller getting stuck? I am also assuming that installing new belt and new roller will fix the issue.
The phonograph was definitely playing too fast before the belt finally gave up - hopefully it is just the speed adjustment issue?
I will double-check all the cleaning / oiling locations. I can also verify that half-nut has proper pressure/position, but do I need to do it at this point?