I'm new to Cathe. I've purchased ME, SM, PUB, PLB, GSCT, GSBBS, GSL, KM, MM, and CM. I absolutely love PUB & PLB and would like to purchase workouts similar in style. My goal is to build muscle - especially in the butt/hamstrings. What other workouts would you suggest? Also, if you have any rotation suggestions, I would appreciate it. (I'm limiting my cardio because I really don't want to lose weight, but, I do want to firm up the lower body.) Thank you.