mechaber doesn’t mean the strings bemakom techeiles acc. to maharshal malbim mishna berura chazon ish. and nobody can argue on that since what they are saying is muchach kana”l
anyways lulei this even if mechaber meant the strings bemakom techeiles a lechatchila can’t go kneged a safek deoraysa (see oc 595) besides for the fact the rama has a kpeida not to be makpid on the mechaber
“Because I managed to find and ask a posek pretty easily.”
a posek par with mahari”l?
did you ask him what he does with maharil, chemdas shlomo, malbim, olas tamid, kli chemda etc.?
it isn’t muchach poskim know those exotic sources. I spoke to many tremendous talmidei chachamim who didn’t know they exist.