Hey gopro, i've adapted your routine to do 2 weeks of 8-12 then 1 week of 4-6 repeat and then do a week of 5x5 and a week of 3x3 to add power and up the lbs in my lifts. I've read SOOOO many conflicting reports of allegid studies that either say to do just 8-12 for size, 4-6 for size *MAX-OT*, or use both...what say you as well as anyone else who relies on kinesiology as well as sports science journals that do studies of different muscle fibers I, IIa, IIb etc??? thanks....i wasn't sure if i should do more 4-6 weeks or more 8-12 weeks...i guess im an ecto-mesomorph i am 5'10, 185lbs, 41" chest, 17 " arms, 24" quads, 15.5" calves, 31" waist...i have decent strength doing deadlifts at 275 for 3 sets of 8-10, chest 3 sets of 9 of 195 on incline, 3 sets of military barbell press of 145 for 8=10 reps, squat 315 for 3 sets of 6...i am looking to maximize my size as well as my strength/density...i'd like to get a lot bigger chest and my arms up to 20 in the next couple of years....put me on the right path fellas...thanks