Today I visited Power Nissan. Not much going on as far as 4x4 vehicles. The only 4x4 there was a 2008 Nissmo Crew Cab that they put the plastic step rails on.
They did let me put my bracket up in the different bumper styles which I made marks on with a shapie so I know where to add the extra holes.
Differences as I now understand them are the one piece bumpers such as the one I used to develop the bracket had 13.5" between the two outside verticals, as did the two piece bumpers. The only difference seems to be the two piece verticals rise forward and will force me to design a different clamp.
The new one piece bumpers now have the space between the outside verticals at 16" which means I just need to add more holes, same clamps can be used. There is also a slight difference in the arc shape the bracket follows but since this bracket rests on top of the bumper material and is not flush with it such as it is in the Xterras, that does not matter too much. The shape is close enough.
2010 two piece bumper slanted verticals.
2010 two piece bumper.
2010 one piece bumper.
Here is the only 2011 I saw on the lot.