Saw this while trawling SlowTech , looks promising , now if only they would have allowed for 25mm tanks to fit .... a whopping 4400Mah !
Can see this sliding top fill being an issue later on .... but you can buy the mod without the tank.
Specs Below :
Mod features:

Can see this sliding top fill being an issue later on .... but you can buy the mod without the tank.


Specs Below :
Mod features:
- Variable wattage: 1W-100W
- Temperature control: 100'C-315'C / 200'F-600'F
- Output mode: VW/Bypass/Smart/TC(Ni,Ti,SS,TCR-M1,M2,M3)
- Resistance range
- 0.05-1.5ohm (TC modes)
- 0.1-3.5ohm (VW/Bypass/Smart mode)
- Maximum charging current: 1A
- Maximum output current: 25A
- Battery capacity: 4400mAh
- Dual circuit protection: The circuit protection system has both software and hardware battery protections of over-charging, over-current and over-discharging
- Reset function: The ASTER RT can be reset in case it could not be powered on after upgraded
- 510 threading connection
- Micro-USB port