I was all ready to buy a CRD box as well as it sounds like they do give good performance benefits for the price but don't want to chance voiding the warranty if I ever have issues with the engine or box so I will be putting this on hold for now 
I know I can remove the box itself, but can't ignore the fact that dealers might be able to retrieve data that would suggest the car has been run above standard.
I know I can remove the box itself, but can't ignore the fact that dealers might be able to retrieve data that would suggest the car has been run above standard.