Aluminum Flywheel Noises - Fix?

[RTStabler51]

I just had a SPEC Stage 1 and the Matched Fidanza Flywheel installed in my turd, and I am one of the unfortunate ones to get the vibration noise between 2-3krpms while decelerating. In reading all the threads on this it seems the only 'fix' is to go back to the stock driveshaft? The next questions I haven't searched, but are all T-5 Mustang driveshafts the same? If I do go back to a stock driveshaft do I need to get it balanced or anything?

Thanks

[jacaraco]

I did same thing last year but with stage II SPEC. Was HORRIBLE!!!! with the alum drive shaft. Put stock DS back in. A little better. Will trash the alum flywheel soon and go back to alum DS.