I wrote this for the Aussies but folks here might be interested
I have a couple of vapeprods just sitting in the cupboard, after I gave up on using them with aspire coils. Too many little thing that were wrong to bother with.
This morning I was setting up one of my cerotanks to taste some of my new mint and I had to make a decision between a protank coil or one of my precious BVC coils

while I was recoiling a protank coil I remembered the vapeprod and wondered, as the threading is the same whether the protank coil would fit. Firstly it didn't the small collars around the Kanger coils are too big to drop down the tube. So I got my sanding guru (hahaha) to take a bit off the collar.
Well that worked.....the 510 connector screw held the coil firmly in place. Now all I needed was a bung to manage the airflow. The actual SS bung is designed to sit atop the aspire coils and the chimney of the protank coil was in the way. So I tried the coil without the chimney and that just flooded in an instant, I tried all sorts of bits I had lying around but nothing quite worked.
Taking a breather and looking at the genuine SS bung I realised that if I turned it upside down if fit snugly over the chimney and the orings were able to do their job of sealing the eliquid in the tube.
Now I know that most of you won't have a spare vapeprod lying around and they are not cheap but I did and it's nice to get them working and in rotation giving me a genuine rebuildable fuss free solution for my Billet Boxs. Protank coils have to be the easiest coils in the vaping world to rebuild.
So some pics of the process showing how the pieces went together
I have them setup in both a tank and the Billet Box ( boro ) and they vape quite differently so I will need to tinker with the wicking to get the right flow in each device. I was also not really careful with my treatment of the coils while tinkering so I will recoil/wick tomorrow. Very pleased with the end result.