For sure! you really have to know your body well before you start using slin pre-workout. Your right! slin was mainly just used post workout.
Ya this guy I know, a friend, big fucken dude too, national guy, was getting ready for a show.
He was using Humilin R pre-workout at 10 iu and 5iu at second last meal then 10 iu of humilin N in the morning of everyday.
Now the problem was he was dieting so already low carbs and the dummy hit the gym an hour and half of squatting, lunges, and cardio for the last 20 min and boom he dropped, got the ambulance called on him and everything but by the time they got there he already downed like 2 liters of Gatorade so he was fine but still.