IMO the PEA has further derisked the project and can be considered the worst case scenario.
No flow sheet issues, PFS will only improve the parameters such as NPV, IRR and recovery %.
No wonder Bruce Campbell on BNN considers good value here.
Typical pattern - institutions now probably buying while retail sold yesterday, and today.
As Bruce was surprised at the selling and noted it was mostly retail who got out (IMO at the wrong time).
FWIW.
Try This Look to the right you will see Part 6
http://www.bnn.ca/Shows/Market-Call-Tonight.aspx?spMailingID=11940468&spUserID=MjQ3MTk5NTA2MTMS1&spJobID=523043951&spReportId=NTIzMDQzOTUxS0