I have been upgrading my Firepower 2 flippers recently and learned a lot from reading this whole thread.

My original flippers were a cocktail of series and parallel coils. The coil stops were odd, and the EOS bracket is spot welded to the base plate - so I just went ahead and bought all the bits I needed for completely new mechs. In this case the 92-93 Williams kit and extra bits and pieces. All except the solenoid brackets which didn’t come with the rebuild kit - so I farmed them from the old mechs and then cut a slot into for the coil lug.

Don’t forget to apply heat shrink to the capacitor wire and the EOS contact point on the flipper pawl.

At first I thought the EOS switch stack was held together by the thread on the screw so went ahead and bought some nuts and bolts to hold it together - and had to cut the bolts down with a Dremel. I later realised that the screw pulls the switch stack together because of a small retaining plate called a Tinnerman Speednut. No matter.

As vid1900 writes - do all the fiddly work on the bench. I wasn’t sure how to attach the capacitor to the EOS switch so just did what I thought made sense and left enough room for the later soldering. The capacitor is not polarised so can be attached in any direction. The pics might help someone.

I just need to affix them to the machine now and work out what to solder where.

Pics are out of order sorry.

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We need a Vids guide to rebuilding and adjusting switches on slingshots.