I have been looking at a few different tuning options and so far DiabloSport and HP Tuners are the ones that majorly stuck out to me. I have a 2015 Challenger R/T 8 Speed Automatic and plan to do extensive modifications to it over time (headers, camshaft, supercharger, and etc.), I am currently leaning toward HP Tuners because I feel like it gives me more freedom to tune when and how I want. With that being said, I know absolutely zero about tuning and after doing a little bit of looking online, it seems highly intimidating but not impossible with all the courses and such. Another reason I am leaning toward HP Tuners is because I'd like to avoid having to buy a tune every time I modify part of my car. Which is what I feel like I'd have to do with DiabloSport. The questions and concerns I have are, has anyone started from the bottom, knowing nothing about tuning and tuned their car? How long did it take? What is the best learning route to go? What are Universal Credits? If I want, can I buy a tune and put it in my car with HP Tuners and tweak over time as needed? Has anyone had issues with HP Tuners? Also does anyone have any tips, tricks and/or advice for me should this be the route that I choose to go?