12th Oct 13 Hi Andrew, Apologies for not writing you sooner, but life and work continue to be more busy than is perhaps necessary. Well, I’ve had the tuning box installed on my truck since early August and what can I say, it is great! Could not believe the change in performance. Thus far I have not made changes to the jumper settings that came from your shop, I don’t see the need to at this stage. I have not noticed any negative changes in how the engine runs or sounds. Thanks again for a great product Andrew! Cheers, Steve