Success! 1/8 inch foam, #30 Ga round Kanthal A-1 , 5/6 wrap over a single thread of boiled cheesecloth. After pulsing for about a minute to burn-off the cheesecloth & set the coil - no hot-spots. This gave me a 1.9 Ω coil, which is more than I usually run, but I want to use it in some VV/VW mods...