Preferred method for me is the Taryn Spin (lot's of youtube vids avail). Very easy to make a sling out of household stuff (I use duct tape and string). For a standard sized Boge: 10 drops+spin, 10 drops+spin, 5 drops+spin, 2 drops just for good luck. Best part about the spin is that there's no wait time required. I can fill a carto in 1 minute and immediately it's ready for use.