There are two different discs available for the single mass setup. I've been through the same pain with rollover noise, and swapped my clutch and trans more times than I care to admit. Anyhow, get the disc with more springs in the hub. Once I did that, my rollover noise was almost entirely eliminated. (only time I hear it is if I lug the engine a bit creeping through a parking lot). I originally installed a Sachs "HD" clutch which had HORRIBLE rollover noise. Went to a LUK standard duty kit, which actually had more springs in the hub of the disc, and it's silent now. You can search my "new transmission time" thread for more info...I had quite the saga getting my pile sorted out after the DMF setup failed, requiring a new trans, 2 new clutches, and several trips to the lift to remove and install it all. Also, here's a couple photos of the discs. The 10 spring disc is the one that makes everything quiet. The 8 spring disc makes some noise but works fine.