we can improve on that setup, and only because i did essentially that.
a screen separating the pollen "drop"/collection area will catch the flowers themselves, saving you the hassle of picking them out as well as keeping their moisture potential out of the "goody".
outdoors or in a container, i'd make a screen "collar" and a collection ring below that. easy peasy, no funk, my neasy.
easy peasy, no funk, my neasy.