In the teardown, all I see are large Phillips screws:
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This probably uses a #2 or #3.
[guide|33172]
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While screw size is shrouded in mystery, there are four basic sizes of Phillips screwdriver — from #0 to #4 — #0 being the smallest. The most common sizes are #2 and #1, #2 for standard screw sizes, #1 for “miniature”. Then there are the jeweler-size screws.Jan 18,