Rabbi Shay Tahan himself doesn’t wear Techelet but one of his sons does, with whom he publicly tied a pair for, using Raavad ratio and Sephardi winds with a manual spacing in between.
From askhalacha.com:
As the primary mover of the Beit Horaa, Rabbi Shay Tahan is very experienced and familiar with the world of halacha. He learned in the prestigious yeshiva Beit Shmaya and in Kiryat Malachi located in Eretz Yisrael. Rabbi Tahan continued on his path of learning Torah in the Mirrer Brooklyn for over the past 20 years. He received smicha from several Torah giants such as Rabbi Shmuel Birnbaum, Rabbi Yisroel Belsky, Rabbi Yechezkel Roth, Rabbi Avraham Nelkenbaum, and others. His achievements include receiving smicha as a sofer stam in both ktiva and hagaa from Rabbi Avraham Tzvi Wosner, shimush in Shaatnez, shimush in bug checking, and also specializes in leniencies in matters of birth contraception from Rabbi Tzvi Meisels. Rabbi Tahan has been the head of the Beit Horaa for more than 3 years running and continues leading it. In addition, Rabbi Tahan has a radio show on JRoot radio every Friday, and gives shiurim on a variety of different topics.
