So, as I say, tonight I took it apart. Relevant pictures are below. As can be seen, the version I have differs from the one reviewed by Mawsley. It looks as though the main concern about the short in the base has been addressed. There's also an extra silicone pad in the base which will go some way to prevent the centre pin (live) from rocking in the post. I also noticed that the insulator for the centre pin is not delrin and instead is very squidgy and soft silicone. In one of the pictures below you can see how my first and only coil has already toasted the top of that. Anyway, I decided that this could go back together without any safety modifications required (but I do intend to do something about the soft insulators in the near future). I did however enlarge the four airholes in the centre pin. This has made a significant difference to the flow - its much airier now, although I think I'd prefer it even looser. Will have to have a think about how best to achieve that. Right now its ticking over on a new coil at 1 ohm with a nice cotton wick. It looks great on my PH22 and its all foggy in here ;) The flavour is far more intense with the cotton, too.
I've added the pictures below for reference. They are pretty self-explanatory I think, so I've not added any commentary. Any questions, just drop me a line.
More soon, no doubt.
D