Montague: Don't know if you are familiar with it but Nautilus also made a Pull Down type machine, as well as the Pull Over machine ,for the back/lats. Where the elbows were to the sides, rather than in front of the body (Pullover exercise) and with the elbows, being on pads, had full focus on moving the resistance down (grip/hands were never involved, as they are in regular chins/pull downs). Very effective, but very hard to get into at first (always wondered i Jones only had average, or below average, height men in mind when designing the Nautilus equipment).
Some guy's never got the full benefit of the Nautilus Pullover machine, not understanding that if was a stand alone exercise instrument. They would add it to their regular lat/back workouts, which was a bit self defeating. If working on most any Nautilus machine, 2 to 3 cycles would only be required, to work a muscle/muscle group to the fullest ability. Sometimes enthusiasm gets the better of common sense. Only exercise than might be added would be Dl's (Romanian, SLDL's, partial, etc), which no only gets the supporting muscle, traps, lower back, but also the grip. Good Luck.