0.25ohms is about the minimum resistance I run on any mech, so remember you are running at the boundary of battery amp limits and still have safety room, so do not red line your battery in a mech all the time (Voltage/Resistance=Amps, use fresh full charge of 4.2v for this calculation). Being the Magneto has a positive contact pin, there should be no issues, just be aware as you use the tank, the insulators of the center pin will age and break down faster with the 0.25ohm coil head compared to the 0.5ohm heads. Definitely "DO NOT" run the tank on a mech mod like the Tugboat Tube, Noisey Cricket, SMPL, or other mods that do not have a positive contact pin. As insulators age and wear out they shrink, allowing the pin to recess further and further into the 510 threading assembly, once flush, on a Faux-Hybrid like the SMPL, the top of the battery then makes contact with both the positive pin and negative threads of the connection creating a dead short, battery goes thermal, worst case scenario you get an expensive trip to the hospital, the Magneto should not run into this issue being it has a positive contact pin to match the positive pin of the tank.