Removed the ball-valve from old partial mash tun and tossed it into my new 10gal cooler. Then built myself a manifold. I'm really happy with how it turned out, hopefully it performs good. All I really need now is a bigger hot lauter tun (or finishing converting one of my other kegs), but i'll make my old brew pot work for now.
Along with getting a few things fixed, and adding new equipment, i picked up some ingredients for an Irish Red, Porter and a new IPA. Gonna kick off my first all-grain this weekend
That's the same cooler (the smaller one) that I use for partial mashes and 2.5 gal AG brews. When I have space, I plan a similar upgrade. If you've done PM in that cooler, you'll have no problem going AG. It will be much like your PM brews, except more grain and no extract.