??”? ??”? ?”? ??’ ??
although he is talking about a school he continues to say “????? ???? ???? ??????” meaning that bnei torah should be machmir even if it costs more.
I don’t know of any psak halacha that is in igros that was written after a teshuva was already written. once a teshuva was written there is nothing to be moisif in a short letter