I have searched and read alot about both ls1 edit and the diablo hand held. My question is if I buy either one and make some changes to the car now, how will it effect me down the road for dyno tuning. Can a shop go in and still dyno tune my car if it doesnt have the stock flash in it. For example I use one or the other just to make fan temp changes and defeat cags. I don't want to buy one or the other only to find out later that it ends up costing me more in the long run just for a tune.