Ya know you can turn the wattage down on that right? You state you want to downgrade to a 30 or 40 watt mod, but also that you need at least 30 watts? That doesn't leave you much of a window.
I know, I usually keep it around 20, and I also know tons of people, like you, want more power. And I don't need it, but always could use a little cash and another tank