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Some half a year or so after doing the teardown, Google did a recall-and-replace on Glass hardware. I didn't figure they'd send a replacement, but after getting a "send whatever you have" I dropped the parts in a box and shipped it away. Soon after.. a new pair arrived.
(As a side-note, the reason I did this was due to having this exact same problem. Sending the parts back to Google seemed like the likely best way to offer the guts up for proper recycling at the time.)
