Sorry, I don't agree with your PEA timeline. If you carefully read the December news release, it implies that Zenyatta will release further news when the optimization studies are complete.
However, even if the bench scale optimization studies are still ongoing in a few weeks, I would expect Zenyatta to provide an update status prior to PDAC, outlining the progress made since last December. Hopefully, for the sake of shareholders, AE will specify the final purity obtained after the flotation concentrate was processed by the caustic bake.