Calvin...I would stick to four weeks and I'm almost positive that you will have to go on Humilin R while on gear. If you're only on "N" right now, that means your pancreas is producing a good amount of insulin but either you're not producing optimal levels or you're insulin insensitive...gear will make you're insulin requirements SKYROCKET. I take at least twice the amount of insulin while on gear and while every diabetic is different, I'm telling you now that you will have to be very careful about this...Do not do an 8 week cycle, just my opinion. Have you done gear before? How long have you been diabetic and on insulin?