The way the credits work skersfan is that when you decide to use the tuner on a car, it needs credits to "unlock" that car. You can read the tune, scan the car, and change the tune but if you want to save that tune for the car you downloaded it from, it has to be unlocked. In theory, I could download your Mallett tune, copy it over to MY ECM's tune and then write that to my car since MY ECM tune is unlocked even though, on my HP Tuners, your Mallett isn't unlocked. Once a car is unlocked, you don't have to use any more credits on it unless you physically change the ECM.
Now you can also get model year tunes, allowing you to tune any 2007 Sky with a 2.4 for example, for (I want to say) 6 credits. To do the same thing with a 2007 Solstice 2.4, you'd need 6 more credits. I think they may offer a special so that if you want to tune ANY Kappa, it's one big purchase of credits but I don't know anyone who has done that.
So DDM wouldn't have needed to use any credits if they used a tuner they have or used the HP Tuner you have. You would only need credits if you wanted to hook your tuner up and tune any other car. Right now, your HP Tuner interface only has your Mallett unlocked on it. (Granted you COULD add the yellow car and Skittles to it and use up your other 4 credits...)
For Razz to use the HP Tuners cable (which I believe Dave at DDM can send a HP Tuner file for the update) he would need to use 2 of your credits to use your HP Tuners to upload it. Once they are used, they're used and if Razz wouldn't be tuning his car after the initial upload, you would have 2 credits tied to his car and his car alone. Hence unless he wanted to tweak the tune after uploading (or wanted to spend the $100 on buying 2 more credits for you) he may be better off just renting the cable and borrowing the laptop.
Last edited by Robotech; 07-12-2016 at 07:16 PM.