The other day I was poking around on the web and saw some magnets that you stick on your hopper to remind you of what pellets you have loaded. They were pretty pricey, too so I got to thinking about how I could make my own. Bought a package of colored magnetic vinyl sheets on Amazon, they came 8 in a pack, two each of four colors, red, green, blue, and yellow. I made up some designs and then cut them as decals on my wife's vinyl cutter. Not too bad for an amateur!