It took little more than 150 min from the 1st access to lower calyx until DJ stent in the end. No nephrostomy tube. To take care about surgical time is crucial to prevent complications but number of tracts (never more than 2 standard), reduce tract size (use smaller standard 24/26 or miniperc) and improve lithotripsy tools (trilogy saves time!). Otherwise is safer to split surgery as you say to prevent complications. I always use flexible ureteroscopy in this cases (PCNL = ECIRS for me!!)