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TIPS TO GET THIS RUNNINg (for me anyway)
Pallet fork; loose enough to freely move was not enough, another 1/4 turn to give it some wobble helped immensely. Possibly because of the impact pin surface issue mentioned below.
Impact pin to pallet fork; Make sure that you're not getting binding between the face of the impact pin housing that is parallel/touching the pallet fork. I was getting binding here and loosening the pallet fork more seemed to help.
"gear train"; Check your "gear train" axle. I assembled mine so it freely moved but this is a counter rotating part which means it can self tighten, mine did even with the nyloc.
Assemble each section and test from left to right and make sure everything spins freely.
Adjustments; The only one I found that really mattered was the impact pin housing (round part) too far one way or the other and it swings too far in one direction. I adjusted this so the ticks and and tocks were roughly even timing, and as such the swing was centered. The two screws on the bracket which limit the pallet fork travel seem to only matter in speeding up or slowing down the tick tock.