hey, just noticed this ~ a RN4081 atomizer (male thread) fits into a 901 atomizer (female thread) perfectly. i pulled out the threaded connector of the RN4081 atomizer so it is intact with the center pin and insulator. only drawback is there's not a lot of surface to anchor the RN4081 connector with, just the knurled edge that was pressed into the atty tube, but a little solder.... 
probably old news to some here, but i thought it was cool.
probably old news to some here, but i thought it was cool.