^^ This ^^ I agree!
To prevent confusion, and "maybe" cases of fit... I would suggest using the list as given by Kanger for single-coil tanks:
EVOD
ProTank
ProTank 2
ProTank 2 Mini
Unitank
Then, if users "know" and "trust" using equipment, other than for it's intended purpose, it will be at their discretion.... This will increase customer satisfaction, decrease returns, and lower overall costs for the V|T Store
At least that's my $0.02....