I would say wrong, and take the 6 months out of your calcs as we will go to full capacity "right from the beginning" as my understanding is that the "ramp up" is now forgone for 640,000 tpa and Almonty will go to 1.2 mil tpa from the start. At the 19.30 mark :-
https://www.youtube.com/watch?v=ghc19vO7M8k
Commissioning might take 6 or more months, but that does not mean that output is not a saleable product and for the most part commissioning is to ensure the equipment supplied is up to the job it was designed for and works for a determined period of time (by the supplier and the company) without any major issues.
The other part of commissioning is to prove to the off-taker (GTP/Plansee) that the product is worthy to buy.
Plant tweaking will be the first part that is very important during commissioning to achieve a grade acceptable for sale.
Tweaks and plant upgrades will be non-stop during the mines life, as there is always a new tech, machine or chemical process innovation that can improve production grades and rates in tpa,
ie when something does not work or is not up to scratch, then you rip it out and replace it with something that is.
Plus far future demands might warrant another Tungsten or Moly process plant on site "over another hill" to meet those demands ???
My meaning on this is that the mines will be in demand for close to 100 years.
I'll be worm food long before that lol and ouch !!!