Re: cam position sensor drb3 question
To my (semi-limited) knowledge, it shouldn't affect anything at all. Although I'm personally unfamiliar with Chrysler's scan tools (only really used the Snap-On Modus and GMC's Tech II), it should just be able to read your sensor info without any problems.
The only way I could see it having problems is if your tune did more than just adjust some default values within the computer (such as add new paramaters for a new part or sensor). If anything, it might have an issue interpreting manufacturer specific data and functions, but scan tools can still usually go into a "generic" mode and read the data that way. Sometimes that varies from the manufactorer specific data, but most often it doesn't.
Long story short, it shouldn't hurt your tune, but if it can't read the sensor data, you might want to go for a more generic scan tool, or see about using the DRB3 in a generic data mode.