I'm a subcontractor working at UCSF. Our original scope was to furnish & install metal framing, insulation & drywall for a total contract value of $148,151.00. We are now being asked to quote additional scopes of work including waterproofing and plastering. This scope would increase the contract a significant amount. Our question is do we need to update the 20 day Prelim notice with these additional scopes and revised contract value?