Should the Rosh's practice of interrupting morning blessings to don tefillin before 'Oter Yisrael' be followed?

Synopsis

The Mechaber records the Rosh's custom of arranging morning blessings up to 'Oter Yisrael b'Tifara,' then donning tefillin, then reciting that blessing. The Aruch HaShulchan notes this is not a formal ruling but a worthy personal practice for those able to do it.

Rishonim
Lenient
Strict
Lesser cited
Major authority

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