Just joined the forum. Longtime lurker. I'm getting ready to buy a 2022 F250 XL/STX. I've found 2 in the preferred Iconic Silver. Unfortunately, neither of these trucks have the factory installed trailer brake controller. My question is, how easily can a factory brake controller be installed after delivery? Is it a plug and play install or is the installation more involved? Would the ECU need re-flashed after the install? I'd rather not install an aftermarket unit unless I have to. Any insight would be greatly appreciated.