I brewed a 40 gallon batch a couple of weeks ago. Just a tester...pure extract. We'll be doing a partial mash (if not a small AG brew) soon. Max capacity is about 60 gallons currently, I think.
Actually that is my plan too. Partial mash the first round. I thought I could save some money on the other vessels. Once I get more money then buy the other two or one. I have a 55 gallon plastic Mash tun but I am still not sure I want to use it. One for looks and two I want to be able to direct fire it. However, I am still not sure I NEED to direct fire it.