As the title says, so I tried putting my 18650 35a 2500 mAh 3.7 V Purple Efest batteries in my nemesis mech mod and it seems to be a near tight fit on it, and I'm not sure if this is suppose to happen. Am I suppose to remove some parts or rings in order for it to fire correctly? I tried pushing the switch with the battery on the bottom to see if it moves, and it doesn't seem to be budging after pushing the firing ring :/? Any tips