Well it was waiting for me when I got home from work this evening so I have built it as per
@instantlady's instructions and am now happily vaping it. Just to clarify what can only be described as an error in the description on 3fvape, the 'bottom feeder pins' are nothing to do with squonking (thankfully). They are for changing the size of the airflow hole underneath the coil. The atty comes fitted with the largest bore pin but this can be unscrewed and replaced with a medium sized hole or a very small hole. I initially tried the smallest one but it was too tight a draw even for me. I ended up with the medium sized pin and adjusted the airflow down using the external airflow ring - perfect. The build quality is pretty good although the screws on the very bottom were quite loose and needed tightening up as was the 510 pin - no big deal. The vape quality is excellent with a wonderful flavour. Is it better than the Kayfun Prime, Skyline, Hussar and Dvarw that I have been using up until now? Probably not but it is every bit as good and it will be used in rotation with these. Overall I'm delighted with my purchase. Highly recommended.