vaper ask me where can order the coil heads, ordered it here, checking..........
https://www.smokstore.com/Smoant-Replacement-Mesh-Coil-Heads-For-Naboo-Tanks
I always use spaced wraps, I make the coil using tight wraps, then stick a needle between the wraps to get them spaced evenly after it is installed in the RBA, works for me.