You don’t mention rinsing your alkaloids, so you probably have some salt in there. Both harmine and harmaline are practically insoluble in room-temperature water, so if you add your alkaloids to a couple liters of water, mix, decant, then allow the alkaloids to dry, you’d get a better idea of the actual yield.

You say the alkaloids are clean. How clean – what color? Almost white? Pale beige? Tan? Light brown?

Oh... Welcome to the forum!