Stella is right, as far as, she has established her wax formula and knows how her wax reacts to most fos in a particular container. It doesn't always work out but most of the time it does. Yes you will feel like you are going in circles with wick testing, but if your wax is not performing in the container you have selected; then you made need to make adjustments to your wax or try another container. You're looking for good cold throw, heat throw, and conservative fuel consumption with the type wick you have chosen. You just have to learn your wax first and that takes time and money. Stella is right when she emphasizes that this is what works for us. You will develop your own technique for testing that feels comfortable to you.