On a side note, where do you get good cheese here in Columbus?
I didn't realize you were in Columbus, Teddy. Obviously my first thought was that you were maybe in Louisville. Are you on the north side?
GFS Marketplace sells 5 lb loaves of GFS mozzarella for usually about $2.50 a pound. Plus they'll slice it for you if you want, which is a huge bonus if you'll be using it for deep dish. When I buy cheese at GFS for deep dish, I ask them to slice it on setting #4, I believe. That's about 1/8". It's not even close to being the best cheese, but it's much better than what you can get at grocery stores, and it's also much cheaper.
Good cheese? Good question. If you want Grande, the only place I know of right now (where you can buy small quantities) is the cheese guy at the North Market (if he's still there). However, he's been known to leave his mozzarella at room temperature for extended periods, and that's not cool for cheese that will be shredded. Also, he only buys one loaf at a time, so he probably gets it from PennMac, which you can do yourself. Speaking of PennMac, you can go to PennMac in Pittsburgh and buy Grande by the loaf or bag. Or you can have them ship it, which I've heard makes it very expensive. (I've never been to PennMac, nor have I bought anything from them.)
And then there's always the possibility of splitting cases with someone like me (as well as possibly other Columbus locals). And this may become a viable option soon, as I intend to start hosting regular pizza gatherings/lessons soon (after I get some things taken care of in the home I just moved into), which means I will go through a lot of cheese, as long as I can get people to show up at the gatherings. A 30-pound case of 6 5-pound bags (shredded) is currently about $100 at GFS and RDP. A case of loaves is probably cheaper per pound, but cases of loaves are almost twice the size of cases of shredded.
Also, you may ask pizzerias to sell you a loaf or a bag or cheese. An RDP salesman once suggested I ask a pizzeria in Pickerington to sell me some Grande cheese (which he knew they used because he was their sales rep). He acted pretty sure that it wouldn't be a big deal for the pizzeria to do this. I never did it, though, because Pickerington is not exactly convenient for me. (This pizzeria has "NY" in its name.) Also, there is a member who runs a business (sorta) out of a classroom in a town near Columbus, who I think may be willing to sell you some Grande cheese for a good price. (I was vague about this because I don't want to speak for him, in case I'm wrong about what I just said.)
Maybe I'll invite you over to help me test out my "new" oven soon, and we can discuss some of this stuff.