We also see by shabbos (Nemukai Yosef in Bava Kama) that we go after the start of the work and saying yaleh veyovai so if we start davening before chatzos we can finish after, even according to the RMA.
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We also see by shabbos (Nemukai Yosef in Bava Kama) that we go after the start of the work and saying yaleh veyovai so if we start davening before chatzos we can finish after, even according to the RMA.