Diggers Shellite isn't fantastic imo. I know myself and friends have had poor results.

I`d personally suggest doing 2 initially toluene pulls (this will get basically everything), evapping till crystals (they form sweet crop circle crystals  ).

Then rextal is hot naptha (or equivalent that can be freeze-precip'd).

Works a treat for me, and saves the hassle of 6 pulls or something.

Re-xtal is way easier than a large number of pulls.