From Newsgroup: rec.games.pinball

We are thrilled to announce that we recently succeeded in our project to building clones of spider chips. We have successfully cloned our first A1752CF from Rockwell. It now runs flawlessly in a Gottlieb System 1 pinball machine replacing its old original ancestor which had made its time on earth. We are happy to share all the required material to reproduce any PPS4 or PPS4-2 peripheral.
https://spider.pps4.fr
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