Since 1975 all I've used is a Krupps grinder. When I'm away from the mother ship and exploring in my Caravan I use a little inverter that plugs into my cigarette lighter to power it. Like pitch said you can adjust the grind by experimenting with the grind time. I used to roast my own beans in a West Bend Poppery II hot-air popcorn popper. It did a nice job but I never charted how to adjust the roasting time in response to the ambient outside temperature (you want to roast coffee outside as it gives off an acrid odor when roasting). As a result I had problems with roasting consistency. However, when I got it right the coffee was outstanding!