While I can and do repack bearings by hand, only do it when I have to. I normally use the cone style you pump with a grease gun. I do not like the other style at all. In a perfect world, I want option D. I was spoiled at my first dealership. They had a drum mounted one. It was like the cone style, but with its own pump, easily the most civilized way to pack bearings. I may have one some day. At work we use 15 gallon drums of grease for most things. When the pumps spit, there is close to 5 gallons left, I have been snagging those. Once I collect a full barrel worth of free grease, I'm think I will buy one of those packer then have four lifetimes of wheel bearing grease.