Copper Fox Metals Inc.

From the March 19th NR: This unexpected delay provides an opportunity to allow inclusion of the updated 2011 drilling results from the Paramount and Liard zones into the mine plan and an opportunity to re-visit the possibility of incorporating the silver into the updated resource estimate." I understand the importance of adding the adding the Paramount and Liard zones to mine plan but am confused about... "opportunity to re-visit the possibility of incorporating the silver into the updated resource estimate." Why would they need a delay to have this opportunity ? Is the RE on a deadline after a BFS? What I guess I dont understand is why would they not just do a RE when they are completely ready with all the numbers needed, if Silver makes a complete RE then take the time to add it?