I'm sure you're aware of this already, but you could pop one of those flared "beauty rings" over the eGo threading.
Makes the ProTank look great on a slimmer battery.
Of course, it's STILL dang top-heavy. I use a vape Caddy (that came along with my nifty Vapor Station e-cig supply box)
and a few of those acrylic puck-type eGo holders for my skinny batteries. Shame the fatty 1300mAh Spinners are too wide
for those....
Hey Zip! Thanks for the tip on the Vape Caddy and Vapor Station. They look pretty cool. I use a mod that's just slightly bigger around than a regular eGo battery and it won't quite fit in my acrylic eGo holder. Do you think it might fit in the Vape Caddy? If not, maybe I could drill one of holes a little larger.
https://www.ecigarettestorage.com/
J.R.