Rashi says that bal tosif by tefilin nullifies the mitzva and when weaing it on shabbos becomes a burden to carry, so if there is bal tosif here, than it would be considered like wearing a talis with no tzitzis.
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Rashi says that bal tosif by tefilin nullifies the mitzva and when weaing it on shabbos becomes a burden to carry, so if there is bal tosif here, than it would be considered like wearing a talis with no tzitzis.