Split Jerk and High Box jumps Workout

Last night I did sets of about 6 reps or more of High Box jumps and sets of 5 split jerks. I wasn't really timing it, but tried to keep pushing at a good pace between the two movements.
Split Jerks started after doing warm up rounds of:
Hang Power Clean, Push Jerk, Squat Clean, Split Jerk x 2 - I did this complex as follows:
45 lbs, 85, 100, 110, 120,
I think at 125 I just started doing sets of 5 of Split Jerk
Split Jerk:
120, 130, 140 (4 - 5 sets)
I used the wrist wraps on the last set of 140 and it felt a lot easier on my wrists.
I just kept on bumping up the height on the box jumps each round until I got to about 42". I was doing about 10 reps each lower height until about 32" and then switched to doing singles and no rebounding and then doing sets of about 6 reps.
Everything felt pretty good overall.
I was trying to dip a little slower and keep the bar deeper across my throat and pop up and really drive with my legs and snap off the wight. I wante to be totally extended with my arms as I realyl stpeed out and landed at the same time.
I was getting into a nice groove, but I think I must lean bakc a bit too much as my lower back feels it sometimes.