I started extract brewing in 1988 and bought a Corona mill to crush my specialty grains. In 1992 it went in a box because I had kids to raise, but in 2008 I got it out and did one last extract brew for old times sake. Then, on Jan 4, 2009, I cranked my way through 11 lbs of grain for my first all-grain batch. Needless to say it took a while to crush 11 lbs with the old Corona.
My first purchase as an all-grain brewer was a CrankandStein 3-row mill, and I've still got it. You couldn't give me a Corona mill these days, much less sell me one!
Charlie