what were you using to watch your timing advance while using the timing tuner thingy? It was my impression that the timing tuner was altering the signal after the pcm... meaning it wouldn't show up on autotap... How did you know when the timing tuner was working or "on the fritz?" Does the scanmaster have a timing advance display? Wouldn't that be the same as the autotap though in regards to where it is getting the signal from?

Now since you have new programming in the computer for your advance, it should be easily viewable at all times. Makes much better sense instead of using a "band-aid" so to speak.