Now that is odd?
My mini pipe atomisers fit my stick (and work very well). But some of the regular ones from e-cigs.co.uk don't (the coloured ones).
When I say don't fit, I mean the base of the atomiser is just a mite too wide to fit through the hole in the top of the stick. Steel fit, black a mite tight, cranberry = way too tight. (which is a shame, cos they are my fave atomisers), and I'm not prepared to get the Dremmel out (well not yet anyway).
I have to admit my stick has pretty much replaced my mini pipe as my device of choice, largley due to the fact I have about a dozen atomisers and nearly as many batteries ( I had a thing for bling/e-cigars, but kept killing them). But also because as much as I like the 'idea' of the pipe. It isn't quite as cross compatible and (IMO) the stick just outperforms it on every level. (battery, construction, compatibility, and performance). So much so I am considering letting my mini pipe spares go.
However if/when someone finally comes out with a midi-pipe working on the similar principles (SD battery, Pen Atomiser, Kissbox manual/auto switches, with regular pipe bowl) I will no-doubt change again.