So far I have only used silica wicks(1mm, 2mm, and 3mm). I have only been rebuilding
coils since 1April2015, but am thinking about adding cotton to my supplies to add as a buffer between layers when I do duals, triples, and quads. If I get a chance to, I would probably find a way to double whatever a coil is originally manufactured for(ex. turning a dual into a quad) if possible. I am always trying to find new challenges for myself. My next project is to attempt to turn the E-Smart BCC
coils I have from singles into duals.