Ann: 99.99% High Purity Alumina Produced, page-166

To be fair, there's plenty of things that will have slowed KRR down here;

• COVID
• COVID
• more COVID
• COVID in the USA could have knocked the definitive GDMS assay schedule about

But the major issue is this.
If you have a flow sheet that proposes to go to HPA it looks like;
Step A
Step B
Step C
...
Step X

If you change step Q (to Q 2.0), and you're trying to show a complete run-through from start to finish to prove a viable Scoping Study, you could need to redo the whole process from Step A to Step X. Certainly you need to have another go after Step Q to Step X.
If every step has an experiment, or a reaction, then you produce a solid and a solution. These need assays. This can take 1 week to get back, especially for the solid. So you know step Step Q 2.0 has worked. You then need to push through all the subsequent steps (waiting a week between each step for assays) to arrive eventually at Step X2.0. Which then needs to be sent to the USA for GDMS analysis...in New York...during a pandemic.

So, yeah, trust me when I say it's not easy to do this stuff. It's not quick, either.