Where abouts in Hampshire are you? I hear they swap the ECU and they remote in to reset the immobiliser and you'll need to do that each time you change it (if you swap it back for service etc). also are you removing the ppf or can you keep it do you know? I am wanting to do the same but worried...
bumped into another raptor owner the other week who had one and claimed it was really good. Didn't say 0-100kmph times but did say it was alot quicker and he was getting 28mpg on the motorway at 75-80mph
see if you have the option for it in the settings on the truck, If not you can activate it with forscan, then buy a key from aliexpress and program it using your two other keys as it states in the manual.