how far you could stray and still not notice any difference
Try this with (color) reversal film. I dare you
B&W film lets you get away with many mistakes and still produce a usable image. It may not be a spectacular print, and if you do get a spectacular print then sloppy technique guarantees that you won't see another until tomorrow or decades from tomorrow and you'll never know why. This sums up my first decade!
Now I always work at 75deg because during summer that's as conveniently chilled as I can manage, so I standardize on that.
I only use two developers, XTol or pyrocat, and both in Jobo tanks and continuous agitation.
Pre-soak to get everything up to temp, plus it's recommended.
Toss in the soup and sit it on a motorized roller, pick it up and flip the direction every minute.
A light indicator stop for 30 sec.
Toss in the fix for however long the TF4 or TF5 recommends.
Wash with the Ilford method, then let it sit in running water longer just in case (I don't have any hypo tests to use here)
Take it off the reel and photo-flo, followed by gently squeegeeing off the excess with my wet fingers.
Hang and wait.
I am considering using a reduced inversion instead of roller with pyrocat soon, want to see how that'll change the results. Which, by the way, I'll be able to tell because I follow a procedure and don't depend on dumb luck