would option one (1) create a "popcorn" effect when grinding beans, that is they would try to jump back out.
this would normally only happen if your only putting one or two shots of beans in the hopper each time
i am not sure if pop corning effects the grind in a bad way, but if the grinder has a "timer" it would
if you can just lift out the finger guard i would try it.
i dont use any hopper in my super jolly 98% of the time. i drop my blind filter in the hole to act as the "lid" 2 doubles of beans fit just nice in the throat of the grinder:)