I also don't see us seeing/needing a revised PEA either.
CUU painstakingly had Teck review (and approve if I recall) the PEA (paid for by CUU) and as a result it took quite a bit longer to complete. I suspected at the time that the point of going to all that trouble was to have Teck fully on the same page as to SC valuation so this wouldn't be disputed in future negotiations. The SC JV adopted most of the PEA recommendations in the recent drilling program targets and associated metalurgical work, suggesting Teck was on board with things.
Having both parties on the same page in terms of currrent value and the incremental value-adds derived from copper price, exchange rate, metal recoveries, pit size, etc. means that Teck could make an offer to CUU (and vice versa) as they are all working from the same numbers. The value of the carried to production clause and exploration potential would be separate but the negotiations would be simplified....and possibly happening since the latest drill results have been in.
JMHO
K