I would not be worried about small amounts of oil leaking if you must load with runny concentrate. It's not going to hurt performance. Store the hercules on its side with the mouthpiece slightly elevated. Runny at room temp is going to leak no matter what. If the oil does not solidify at a certain temperature then you must expect it to behave like a fluid at that temperature.
I would recommend trying both, because I cannot answer this question for you. It is your personal preference. If you are satisfied with the way the Hercules performs with 2 coils, great. If you get better results with one coil, that's cool. If you get less leakage with more cool downs, then the cool downs you were doing before were insufficient. If you don't get any less leakage then you were doing enough. You can always put one coil in, see how it works, and stack a second coil if you are noticing too much leakage in the lower chamber. With the -74, it takes about ten seconds to take the shield off, separate the two chambers, and see what's going on. You can then pop it back together in another ten seconds and decide to add a coil or not or take one out. Don't be scared of using and checking the cart. The more practice you have at it the easier you will realize it is to maintain. The Hercules provides freedom to try different techniques, different voltage rods, different coil/wick configs. Use that to your advantage. Don't take one person's best results, who lives in a different climate, who is using different concentrates, as "the only way". You paid for it, it is yours to do as you see fit, and use it in the way that provides you the most satisfaction. Feel free to experiment, enjoy the device, have fun with it.
). must say that compared to the old 2.4 & 5.0 oe carts i love the kiss. especially now that im using room stable wax loading is soo easy.
