Hi beer friends, I recently inherited two 5-gallon Home Depot brand beverage coolers and would like to outfit them for all-grain brewing (I've only ever done extract brewing). I understand now that 10-gallon mash tuns are much more appropriate for 5-gallon batches (oh well - they were free anyway). I know that there are a few posts on this topic but I've seen very different responses. I would prefer to not be limited by brewing only low gravity beers. So a few questions: Does anyone else use a 5-gallon mash tun for brewing 5-gallon batches? What are the limitations? Since I have two coolers at my disposal, would it make a difference if I turn one of them into a gravity feeding hot liquor tank for fly sparging? Batch sparging with a 5-gallon mash tun vs. fly sparging with a 5-gallon mash tun - what can I expect for max gravity for each method? Sorry for the noobish questions guys! I'm a relatively new homebrewer and looking to expand my operation without emptying my wallet.