Pop the magnetic cap off, press your bud into the mini grinder and grind right into the waiting mini funnel.  Take off the pressed in cone packer rod. Slide a pre roll cone over your mini funnel and use to cone packer rod to maker a nice, tight pre-roll. The cone packer rod is also a mold to form your own pre-roll cone around....if you are into that...little too much work for me.
 
Two versions
Plastic standard version 
Aluminum premium version