Got my flipper issue solved, thanks guys!
I'm now looking to tweak the well walker, as he registers phantom hits.
Do I adjust the switch (pic 1)? And if so, how?
Seems as though it's "off" when depressed, and registers when it's released.
So would I bend the arm down?
-or-
The spring (pic 2) seems a little weak and flimsy. Maybe that should be replaced with a newer one?
My pin was folded in storage for a few months. Maybe the spring was stretched that whole time, rendering it less effective?

Any thoughts guys?

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Thanks for the reply!
I had a couple extra flipper return springs on hand so I used one of those instead. So far it seems to be fine.
I figured that I didn't really want to mess with the switch, so much as stop the zombie from bouncing around too easily.