The insulator ring also has a lip around the inside that locks it in place unlike the pics I've seen of the v1 and v2 models.
Edit; I've seen mention that the insulators are not swappable between the 2 and the 2.5. Guess that's the difference.
Edit; I've seen mention that the insulators are not swappable between the 2 and the 2.5. Guess that's the difference.
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