Ok I plan on using the Timing Tuner on my truck for timing retard when I spray since I dont want to lose any performance by messing with the custom tune. !st off- You can use the Timing Tuner for timing retard and window switch functions at the same time-correct? I was thinking about using the timing tuner for the timing retard but getting the MSD(#8969) digital window switch because it is so easy to adjsut. Would there be any point of using the MSD DWS and the TT besides eas of use of the DWS? Are any of you guys using the TT for just timing and using another WS? Thanks!