Architects want us running the live Revit model in ACC on iPads so clashes get caught faster, but spotty service and mid‑day tweaks are scrambling crews; when we stick to Bluebeam-issued PDFs the site stays stable, yet we miss late design edits and RFI count climbs. What’s your practical split - weekly locked PDFs for foremen with Navisworks/Revizto access for supers/layout, or another combo that keeps architects nimble without whiplashing the field?