Very nice write up, lots of high quality details, I like it! Putting an M & G on our 2011 GMC was a snap. Putting one on our '03 Rubicon, was a tad more difficult but, still not all that bad. But, putting one on this new '15 JKUR has got me wondering. I've done just about everything under the sun in mechanics on all my cars/trucks/motorhomes/boats/motorcycles for decades an decades. This is one of those things that I guess, I'm just getting tired. I'm tired of fighting things. Yeah, I suppose I'll get a new M & G and install it but, I'll be arguing with myself all during the installation.
OK, enough rant. You did a great job, great photos, great explanation and detail. I try and do the same when I'm showing something I've done on here. By the way, if you read this, what kind/model/amount of lift do you have on your JK? It looks good. Do you do much off roading? If so, do you rub any on your fenders/rear/front?
I just installed a "Leveling kit" on ours and am running 315 70 17 ATs on American Racing Anson Off Road 17"x7" wheels with 4.25" off-set. I'm getting a bit of rubbing, on dips even while street driving, mostly on the back fenders.