Holly, I hope that I can help you with a few things. I have used the wilton molds to make tarts. Each of the tarts weighed .74 to .78 ounces and you are able to buy them in a variety of shapes and sizes, which makes it nice for special occasions. I have recently started using the metal tart molds and have found out that some are not the full one ounce. I have ordered some from Candle Source and have not had a chance to use them yet, but comparing them to what I have, they are larger at the bottom of the tart, so hopefully, they will be the full ounce I am looking for. I use the smaller aluminum pitchers, I think they hold two lbs. I like using these for making tarts because it is easier to control the pouring. I fill it about 1/2 full, once again it is easier to control your pouring with less wax in the pitcher. I do spill some, but it is a whole lot less with it half full. I have a cookie sheet that I line with extra heavy foil, I then line it with paper towels. I put my wilton molds and my metal tart molds on them in a 200 degree oven to heat them up. If I need to melt any wax off of them, I just flip them over on the paper towels, then change the paper towels as needed. I have never had any problems with using paper towels in my oven, on low heat. I know this is long, but I hope it will help!