I did the Rear Seat Angle Adjustment Mod today. The girls were complaining that the back seat was too upright... which is fair if you've ever sat back there.
The spacer dimensions I found on the forum-that-sensors didn't work for me (maybe 2011 is different) hence the extra holes in the longer rear spacers.
I made my spacers out of 1-1/2 x 3/8 Aluminum bar stock. Only $12.01 (cut) from a local metal supply.
The 4 for the front legs are 1-1/2 long with a 1/2 hole, 3/4 from the end.
The 3 for the rear brackets are 4" long with a 1/2 hole 1-3/4 from the end.
First remove the 4 bolts on the front legs. 18 mm socket. Probably going to need a breaker bar and a 6-point socket because they are TIGHT!
Next, use the ratcheting feature of the seat belts to hold up the seat bottoms and remove the 3 bolts on the rear brackets. Again, they are TIGHT.
Next loosen the 2 nuts and one bolt on the rear of the rear brackets.
Now, tilt the brackets back and insert the long spacers. I had to egg out one of the 3 holes on a seat bracket to get things lined up... not quite enough slop to get that bolt started straight.
After they're done, don't forget tighten down the rear nuts and bolt.
Finally, mount the short spacers under the front legs.
Have a brew and let the kids try it out
It might be hard to tell from the pics, but the long spacers kick the bottom of the seat-back forward for more recline and the short spacers lift the front of the seat bottom for more comfort... and in my opinion more safety. That extra angle on the seat bottom will help prevent a person from submarining under the seat belt in a front collision. Also note that the bolts are plenty long enough to still go entirely through the weld-nuts on the body. I really don't want to start a tirade on safety, so please only consider this mod at your own risk.