Will have a bash at a few of these questions (though I'd never be in this game).
I'm pretty tempted to call the river, since our hand is pretty face-up and because he makes a small overbet ($420 into $390). I don't get why he'd make that bet for value - the fact of its being a overbet screams strength, so if you're overbetting for value then surely you might as well go with it and overbet big. Or alternatively bet half the pot or whatever and get called more often. This bet size looks like he wants to overbet but wants to do so as cheaply as possible.
On that basis I guess I'm calling bets of something like 75% of the pot through to small overbets, and folding to everything else.
The ideas for different lines on the turn are interesting - don't know what's best, and I imagine I'd feel I was getting myself into some pretty unpleasant spots here by doing it. But at the same time it feels like changing your perceived range somehow has to be a good thing (especially against this villain). I don't really get the idea of donking the turn to look strong though - maybe you can explain the benefits. Surely he's never folding any pair 88+?
Check-raising the turn I think I prefer, as it widens our range to include 7's and draws and gives us a simple line of turning our hand into a bluff on a lot of rivers. (All rivers? Or do we have to shut down on rivers of 2-3-4-6 at least if we get called on turn?) The pot's bigger than if we donk the turn, so he can't necessarily just call to showdown with 88+ so easily.
Attempted to answer some questions, but probably ended up asking more, and some of that's probably missed the point completely so sorry about that... Found the questions interesting though, so thanks for posting.
I liked this sentence by the way!
When the fish left I told villain "fish has gone, 10 mins" [purportedly] because of etiquette [but actually because] sometimes people tilt and chase when they're behind with a time limit.
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