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Wednesday 23 May 2018 at 06:38
Voltage is definitely a problem with Houdini. I haven’t measured it yet, but I suspect a few volts is enough for the lower catapult and VUK to miss/fail. Just having one other pin on the same circuit is enough. I’ve not seen a pin this sensitive to voltage changes before.
Source: http://pinside.com/pinball/forum/topic/american-pinball-houdini-thread/page/81#post-4413257