Start is the main thing that you get smooth seed dose.
As important is the controll of temperature of big amount, that crystallization happens quickly.
Difficulty is in summer temperature. Crystallization happens best in 15C and where you get that?
My friend uses a chest freezener. He put time cutting into electrict that the chest keeps the 15C temp.
The more quickly crystallization happens, the bigger is the number of crystalls (=many)
If crystallization is slow, seeds have time to grow bigger.
That chest is good to use as honey store. If temp is 25C, honey starts to melt back and it gets a fermented aroma after 3 months. It is living a chemical mixture, you know.