I've extract brewed a bunch of times and I like how it's quick, easy, and consistent. But yesterday at the LHBS I accidentally asked for a "mini mash" recipe instead of an extract kit. It was basically half grain and half extract. I've done a few brews with specialty grain steeps in the past, so I figured I'd just wing it and try this mini mash recipe and I think it turned out pretty well. So well in fact that it made me want to move to all grain but I'm wondering if the equipment I currently have will work. I have access to two coolers, a 5 gallon round beverage cooler which I just used for the mini mash kit and it worked alright. I just left my grains loosely in a bag during the mash. I could buy a false floor or drain tube for this if it will do the job. Alternatively I have a nice 45 quart Yeti cooler I could use and I know this would accommodate bigger beers, but would need to figure out how to strain the grains. For my pot I currently have a 3 gallon one and obviously since I'm brewing 5 gallon batches that's not going to work. I bought an old keg from a friend that I can convert to a keggle. I assume I just need a drain valve for that. Is that all I really need? The process for all grain seems pretty straight forward other than that.