I have ran my AWE for months and no issues.
Just recently installed the bash tip. Had to adjust it after a test drive. It was making the bumper hot. No problem now.
The ford performance tuner will calibrate for the the 37" tires.
I have 37" recon grapplers and the speedo is spot on with gps.
Didn't need anything extra.
Just had a set of extended travel Radflo's installed on my 22 4dr wildtrak. They were left at the height they were shipped at. Once installed the rear had the be adjusted a half inch to level the it with the front. It had a rake to the rear.
Still playing with the adjusters to get a better...