Welcome and thanks for the post Sizz.
I invested in WLC too and recall the old PFS (along with a demonstration Li extraction facility in Germany), but don't know the difference between the old one and the upcoming new one, unless it's simply an update, possibly with some new technology being used in the extraction process.
One thing's for sure, LAC is under 20 months to production in the SQM joint venture and the new PFS is out in June, so it's certainly starting to get interesting.
Regards, G8tr