The easiest way to empty the Hoppers is to mount the press to a wood block on our Bench Plate Kit, so it can be mounted and dismounted easily. When you want to change shot or powder bushings, just loosen the Bench Plate hardware, and use the Tray Cover as a valve by laying it on top of the Hoppers, leaving only a corner of the Hopper you want to empty uncovered. View the Load All II drill template here for a wood base: http://www.leeprecision.com/cgi-data/instruct/90070.pdf