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Tuesday 22 May 2018 at 08:38
Just attempted to count the pins as shown on the video walk thru of the show (on SAT)
as posted on pinball news
and I came up with ~340 pins this time,
and that is not counting any games brought or sold at the swap meet.
Source: http://pinside.com/pinball/forum/topic/the-official-2018-golden-state-pinball-festival-thread/page/26#post-4411402