Thanks Kelemvor... Im glad my Geordie accent didnt spoil it too much.
One additional point to mention. With a view to re doing that video to cover the things I forgot, I looked in my collection of atomisers, and found several brand new ones that had been purchased in multipacks, some iVapour-elixir, and some TW, none would work in the V3.
On looking closely at the fitting inside the V2 and V3 in the atty shaft, I noted that the fitting is cross cut on the V2, but just round with no cuts in the V3.
Try using an atty other than a Janty in the V3 you have and see if it works?