Weird. I would've expected the tanks to be too small because FT says that atty is 21.1mm.
My clone is 20.7mm wide.
the glass OD is the same OD as the atty, its the ID that is off by about a mm or so. the plastic tanks OD is smaller than the OD of the atty but still about 1mm to large to secure to the atty/top cap. going to comb through 33 pages of post and see how big the stock O rings are and try to find some that are 1mm or so larger to try out.