One of the biggest hurdles I came across when switching to all-grain was learning how to sparge. I honestly still don't think I do it 100% correctly. There are very detailed descriptions online, but ...
I have made 7 or 8 extract brews over the past year and am interested in moving up to all-grain. What equipment is needed, and what steps are added to the process.
I'm looking to do an all grain Witbier as one of my first AG brews. Bell's Winter White is a commercial example that I like, although I'm not necessarily looking to clone it.