What I've found is that you can take your truck to a tuner, pretty much anywhere, and get a one-time-tune for about $400 and absolutely zero support after that. If you need updates later, break out your wallet for another $400 tune. You may have to wait and get aggrevated while waiting for small items in the tune to get corrected but at least you have the option with the mail order tune. I always recommend to install the Nelson tune and drive it a few day before returning your original PCM. If in doubt you can put your stock tune back in until a tune comes that works the way you want it to work.