All oil containing seeds such as Hemp seeds, sunflower seeds, pumpkin seeds, flax seeds, poppy seeds, sesame seeds, nuts cannot be milled with the Mockmill alone. Otherwise the milling stones can stick together and damage the Mockmill.
Oily seeds can be milled together with dry grist (together with the grist with which they are baked in a ratio of 5% to 95%.) Here, too, care must be taken that the milling stones do not stick together.
Coffee should never be milled.
Buckwheat, on the other hand, can be milled without any problems.