I recently got Toytec
adjustable coilover kit and 2" AAL for non-TSB springs, and 5100's all around. My truck is a new DC LB, had less than 4000 miles when I did the install. I don't know if the new truck springs had an effect, but the 2" AAL's lifted the rear 3". also, the front red coils settled prob 3/4" to 1" over the first 1000 miles or less. I re-adjusted them twice in the first 2 weeks, they're now appearing stable at just a hair under 2 1/2 ". The rear has not settled at all, but I haven't carried much weight yet. the ride is very much improved over stock. Much firmer, but not uncomfortable. No more mushy car ride.
I have not seen mention of either the front settling nor the rear 3" height before. Maybe most are putting the AAL's on saggy older springs? I was surprised at the degree of sag in the front. I suggest driving a good 1000 miles before finalizing the front and getting an alignment. No sense spending money to align just to crank the CO's again.