35 replacement knobs?

Yes - I can see how replacing that many might cause a bit of deficit in one's finances. But - other than Jim's salient question about confusing plastic controls with a lifting apparatus - how can that many knobs be damaged? Here are some wild guesses:
1. The mixer was used as a location audio device by a film crew engaged in live detonation work, and a rigged effect went sideways.
2. The console was used as a live performance mixer, and instead of a sturdy, proper hard case to protect it during transport, it was stuffed inside a bed blanket.
3. An edgy country and western band who wore more than cowboy hats on stage, fired their .44 Ruger Blackhawks at the audio guy. Fortunately the rounds missed the tech, but did some wholesale damage to the DM.
4. Unable to achieve a proper balance of the above referenced band, that same audio tech - in a fit of frustration - fired his own weapon at the mixer.
5. The mixer slipped off a shelf.
Seriously, though, despite the fact the DM's pots and encoder knobs are made of plastic, they're not exactly flimsy junk. It takes some serious abuse to break 'em, methinx.
CaptDan