mayan_dvash:
about rabbi rudinsky’s psak regarding the techeiles, here it is first hand:
it is kosher, but not mandatory. the issur of techeiles being of the wrong color is on teh seller, not the wearer. if the wearer thinks he is wearing techeiles, he is fine. the peiople selling this, they have done tremendous amounts of research, and truelly believe they have found it. so that issur is moot. he said that until moshiach comes and tells us for certain that this is the techeiles, their is no mandatory obligation to wear it. there are people in his shul that wear it, but few. in his yeshiva there are also a few, but not wveryone. as far as rabbi ari senter’s psak, it may be based on his rebbe’s – rabbi rudinsky- psak, which he was there for shabbos afternoons about 10 years ago, when this techeiles was found. for more shiurim from rabbi rudinsky, for those that have no clue who he is, and the vast amount of knowledge he posseses, they can be downloade3d and heard at ohrreuven.com. his sefer mishkan bezalel is also available there. he was on of the talmidei muvhak of reb yaakov kaminetzky, and learned bechavrusa with him from the age of 5-6 till reb yaakov’s petira.