R’ Shimshon of Astropol clarified the AR”I’s statement that at a certain year, someone will come out saying that he found Techeiles and the rabbis of that generation would not believe him. Therefore this is the one time you do not listen to the other Rabbis. This came well before the Radzyner Rebbe came out with his cuttlefish Techeiles, auspiciously on the predicted year.
On the flip side, many in Breslov don’t wear Techeiles.