Sigh... It's dead, Jim.

I've never done this before and no one warned me how bad the aged plumbers putty would reek.

In place. Learned a lot. Almost time to flip a switch and hope.

It works! It's so much quieter than the old one I thought it was stalling. Everything seems to be draining correctly. I'm looking forward to not doing that again for another 10 years at least!

@DoubleAtari
Your picture crop leaves me slightly concerned. Because I can't see how the drain is from there originally. And while it might work, it might also not be premium. Like, is there a P-trap? Can you post another picture with the complete drainage setup? Just trying to be helpful. Not critical.

@FireMonkey I set it up the same way the previous disposal. Not sure how much can be seen here but I'd already put everything back in the cabinet.

@DoubleAtari
Ah, that's fine. Perspective in the first picture and the lack of seeing the plumbing let me imagine bad things. Is there a second wall drain in the 1st new install pic? If not, just weird perspective. All good and congratulations!