So one of the crucial check points in the process is Step 10. There's a previous check where the instruction ask to check one angle (15 degrees). Step 10 asks you to check 3 different ones. I rechecked the 15 degrees and saw that I was about a degree off on both sides. The next one I checked, I was curiously on point at 85 degrees (outside of the wings to the theoretical flat face of the front of the bumper. Using a piece of wood that I cut many months ago (perfect in fact for the job), it hit 85 degrees. Sweet. This was the one that concerned me the most. I checked the rear most measurement of 69.25" and it was off by about a 1/16". Whew! While not 100% perfect, I think and i hope that a degree or two or 1/16" won't make the difference between being happy or having to redo the whole thing again---which would NOT be fun.
So I'm confident at this point to make a few more tacks to make sure this thing doesn't fall apart on me if I drop it when I test mount it. I'm still waiting to hear from the TNF about my question about bracing the hitch receiver at a 90 degree angle.
Speaking of test mounting, this thing is getting heavy. I watched a Timmy the Toolman vid where he mounted a CBI bumper and sure enough: transmission mount and two extra helpers. I need some more friends up here lol!