So I got my KFv5 in.
I tried a 2.5mm inner diameter 8 wrap 24g ss316 and I think the build was too big (since the ohms reading wasn't correct). I also put in a 2.5mm ss316 Clapton and wasn't getting the best result.
I now have a 6 wrap, 2.0mm, fused Kanthol Clapton in there and seems to be doing better. Ohms out at about 0.65. But I'm thinking the 6 wraps is restricting airflow abit.
What's everybody else using for their builds? I do have other premade Clapton wires...but, can you put in a 0.25ohm build, or a 0.15ohm TC building...the basic instructions suggests no bigger than a 2.0mm and 0.5ohm build.