Does someone know anything about Rav Yaakov Moshe Hillel shlita hamekubal stating that tzitzios should be worn outside the clothes? I read it once but without any sources on a web forum. It would be quite surprising as one of the argument to tuck them is based on kabbalah and the Arizal.
In his book Geburat HaAri (pg. 137) he brings the AriZal and explains that according to him they should be exposed because in Shaar HaKawanot (7c) the Ari says that there is a Miswa to behold the Sisiot (see Debarim 15:39).
He expounds on this immensely in his Sefer Wayashov HaYam (vol. 1 Siman 3).
It may be interesting to note, I once saw in his a yeshiva a Scanning of hand written note from Rav Yitchak Keduri Ztz"l agreeing with this ruling and the argument that Rav Hillel puts forth in vayashov Hayam, also a photo of the Baba sali with very long sitzit that where hanging below his gown. Rav Hillel (because of a seeming contradiction in the kitvei haArizal) believes this practice is an authentic Kabalistic one,