Here is another concept for you to think out. Have you ever...

Here is another concept for you to think out.
Have you ever stopped to think about the fact that MacKay has 3-4 time the surface area that LD has to work with but the drainable resource in the top 6 metres is less than 25 greater?
It isn't because the potassium concentration at Mackay is 50% less.
Mackay does not give up its resource as easy. It has a lower total porosity and yield. I assume this will also result in poorer recharge. The difference gets worse with depth. The concepts of TP and yield are not rocket science.
In my opinion MacKay needs the large area it has to be viable. I think the large area/low risk argument is highly questionable. Trenching is low risk full stop. Mackay isn't lower risk because it is bigger. Mackay needs to be big to allow high output with its lower metrics.
What do you think?
(And if you don't think the RWD hydro stuff is up to scratch did you note that they used KP like AMN).