I know the dual coils wont fit in mine, please excuse the lousy pic,
View attachment 494144
The one on the left fits my mini 2, the one on the right doesn’t. Ive also had the chimney of the proper atomizer not fit on occasion, so evidently there are some of these in circulation with a larger OD chimney.
I would do this,
Remove the top and the glass tank, then assemble the bottom and see if the chimney of the coil head even fits into the stem.
I was bummed when I found out the dual coil atomizers wouldn’t fit, but that little bugger sure seems to put out good flavor just the way it is, I just bought a Kanger bundle in the classifieds mainly because there was two of these little gems in there, lol. Please let me know what you find out.