Rabbi Blumenkrantz’s 2019 Pesach Sefer page 415 has an updated list of permissible Norelco triple head Shavers. He also quotes the psakim from Rav Moshe Feinstein Zatzal earlier in the same chapter 27.
It states the following:
Based on a conversation with Hora Dovid Feinstein Shlita, he has advised that, in his opinion, Norelco now produces shavers without lifts that are Kosher to use straight out of the box. The following shavers are considered the best shavers available on the market as off this time: Phillips Norelco 6945XL, 6948XL, 6955XL, 1100, 2100, 2300, 3100, 3500, 3600 with Closecut or Comfortcut blade system and all other Norelco Shavers which say Closecut or Comfortcut on the blade heads.
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