I already have a small circular kiln with a 12″ diameter shelf. I am looking to purchase a larger kiln to do larger projects. I debating between just a larger top loading kiln with a larger shelf or getting the refrigerator style with a 22 ” shelf. Insight into the advantages or disadvantages of each would be so helpful. I would like to experiment with hot combing which is why I looked into the refrigerator style.I already have a 220 line in my garage.