If you have any questions about the Zipper mech, let me know. I rebuilt one for a Bally Fireball that was a total mess.

Don't be afraid of the Zipper mech. I would suggest new nyliners and nylon washers between the flipper plates. They are always beat to hell and back. Steve should have the small nyliners and I sourced the washers (2 sizes) from an online supplier.

Steve has the flipper rebuild kit for the flippers on the Zipper mech; the usual plungers, links, springs etc.

Yes, a very tiny amount. I actually used a small amount of Suoerlube, not the oil.

What play are you referring to regarding the Zipper?

When it closes, there should be just a small amount of travel where the nylon ramp catches the lever that keeps it closed. Another words, the ramp has a small amount of movement towards the large coil that pulls the Zipper closed and the edge of the locking lever (when it is closed).

There is tolerance in all the pieces. It was probably tighter when new and didn't have thousands of movements. The wings that hold the coils have some lash before they close. And the slide has a bit if lash too. Have the whole thing clean and operating smoothly is key.

Happy to help! Plenty of members here helped me along the way. I'm enjoying your thread and glad that I could chip in some way.

Looks great!