Well... I managed to finally get it installed. Only took about 4-5 times longer than the estimated "45 minutes" in the leaflet, but it's on there!
I was able to get a box end wrench through the frame on the sides like Busa suggested, but apparently whoever last put those bolts in used God's torque wrench to do it. I got on the nut and when I turned the bolt it rounded the nut off instantly... On both sides. Ugh... Sooooo out came the grinder and off went their heads. I used the spare clips to replace them.
The bumper looks good and is very solid. That being said, Rogue's packing and shipping department is a joke! Not only did they forget to include the bumper side panels (which to my understanding were suppose to be rivited on during the bumpers construction) they also didn't include the three bolts needed to connect the belly skid to the rear frame of the bumper. They did include three bolts... They were just the wrong size so I had to scrounge up three 3/8" bolts to get it working. Speaking of size, the instructions had a list of needed tools, all metric. Imagine my surprise when I went to tighten the four new frame bolts with my 21mm socket and they rounded off! Turns out the supplied frame bolts were 3/4" sae... Not a single mention of that anywhere in the instructions.
The last instruction is to "reinstall the hood latch." That's it. Where and with what? Turns out the mounting location for it was on the old bumper. Well there was an included plate that I couldn't find mention of anywhere else. Turns out the holes fit the latch perfectly. Great, except for they of course didn't include any bolts or nuts to secure it so, back to the bolt bin.
All in all, it's pretty nitpicky complaints, but we are talking about $2000 for a custom purpose built add on. I think most people would expect a little more attention to detail. I mean, how hard would it be to add a part list and a few pics to the installation instructions? Every body has a digital camera right in their phone these days and pretty much anybody with 15 minutes worth of computer experience should be able to figure out how to insert pics into those instructions using any basic word processor. And how tight is the profit margin that you can't be bothered to even print and include a hard copy of the single page instruction sheet you do have? Hell... I ordered a $10 vinyl sticker off eBay the other day and even they included an installation sheet... With pictures!
Well, that'll about do it for my ranting. All things considered I'm happy with the bumper and love the new look. In the end, I guess that's all that really counts.