This one involves a D-handle attached at the top of a cable column.
A – Lateral Straight-Arm Pulldown
B – One-Arm Triceps Extension
C – High to Low Cable Chop
Keep your torso fairly perpendicular to the cable column. Don't rotate your torso away from the cable column more than a few degrees as you reach the bottom of the range of motion. This greatly reduces the rotational tension on your torso.
Switch the pin placement to use a heavier load on the easier exercises and use a lighter load for the most difficult exercises.
In Part One of my "no curls" arm specialization training series, I talked about the absurdity of most arm specialization routines. I proposed that most trainees do more than enough biceps curls and triceps press downs and don't really need more of either of them.