looks great. Z automotive is working on a 4XE update. I will mention to you, if your speedometer is off, so is your odometer and your mileage or mpg calculation. so 15 miles per charge is more like 16.5 miles (my odometer is off 9.4% from going to a ko2 37” tire) But you might want to compare the route driven against a map to verify actual range difference.
We had a teraflex 3.5 inch lift installed by the dealership with 37s. Looks great and is running well. But, they were unable to get the tazer to change the speedometer yet and the battery mileage definitely has taken a hit, seems like it’s down to around 15 miles now on the battery per charge. Bringing it back this next week to get the bumper and winch put on. Will update again from there