When is the optimal time to put on Rabbeinu Tam Tefillin in a non-Chabad Rosh Chodesh Minyan that doesn’t take a break after U’va Letziyon?
Question: If I'm behind, or if the minyan does not put Rabbeinu Tam (ashkenaz) can I first daven musaf with the minyan and then put Rabbeinu Tam tefillin? …