When given an Aliyah in a shul that uses a katan as the tenth "man" of the minyan, which is contrary to the opinion of the vast majority of gedolei haposkim (SA 55:4), what should one do? Simply refuse? Maybe walk out to save them from blessings in vain?
Is one permitted to refuse to attend a minyan where they occasionally use a katan, as one does not wish to jeopardize his tefilla b'tzibbur?