Drunken Knights

Those knights have been quaffing ale at the inn again, and are now so drunk they don't know upside-down from right-side-up! They know those grey lines are thermometers, but they can't remember which way round they go. Can you help?

Normal sudoku rules apply.

Cells a chess knight's move apart cannot contain the same digit.

Digits in cages cannot repeat, and must sum to the clue in the top left corner, if given.

The grey lines are thermometers where digits must increase from the bulb end. It is up to you to deduce which end is which!