How does the type of material used (different types of plastic or metal), and material thickness, affect the performance of the devices?
A. No one knows all the answers for sure, but, as I have shared in my list groups in the past, my intuitive sense is to avoid metals and aluminized cardboard or aluminized plastic, and instead to stick to cardboard or to low to medium-density plastics for the most part. And, for the inner cylinder, I try to keep wall thickness to 1/4″ or less. However, the reality is that some folks have reported success even using metallic outer cylinders and inner cylinders, and so I may be guilty of being overly cautious! All in all, I prefer to listen to my intuition! Q. When I include your supplemental mixture as an additive to the magnetite sand in the device, how comparable would the device — using the traditional cardboard oatmeal can design — be to your SM1 or SM2? A. Much as I have indicated elsewhere on this page and in my notes to my email list groups, the addition of the supplemental mixture to the magnetite sand seems to render any and all of the versions of this technology — whether t
