Interpreting Beethoven #Metronome

Was Beethovens metronome broken? My thoughts about Beethoven and Mälzels Metronome

Beethovens Metronome Markings: Discussing the different theories, and how they stand up to Beethovens Letters.

The Double Beat Theory: The Solution to Beethovens Metronome Markings?

The last article of Interpreting Beethoven discussing the metronome markings. Is the Single Beat or Double Beat theory right?