I have recently downloaded the Cisco provided Stencil for the 2900 series routers. I was looking at using the 2911/K9 rear view for some documentation and I noticed that the GE0/1 and GE0/2 ports are not correct on the stencil:
and here is an actual pic of 2991 Router. Notice that the stencil has GE02 on the bottom, but my router has GE0/1 on the bottom:
???