Vibration Rattle

Two weeks after my warranty expired (of course!) my Instinct Solar started rattling on some (but not all) vibrations.  Nothing specific happened to the watch (impact, etc) so I'm not sure why it started.  I've seen threads on this problem on other models (e.g. Venu and Instinct non-solar), but nothing on Instinct Solar.  Anyone else seen this?  Non-warranty repair quote was $140, trying to decide if I want to get it repaired.  If I'm just unlucky, maybe I suck it up, but it's a little disappointing for Garmin's most rugged option.

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