Yeah temperature is the END ALL AND BE ALL when it comes to subbing if the temp is off you might as well be pissin your own dirty urine!! Like I said before hot hands is the key!!!
WHY?? Sure the QF kit comes with its own heating pad but there is only one.... which is why I recommend the hot hands. You can scoop up 4 for a buck and some change and then you can practice with them as well as put them to use when its GO TIME!!