Okay, let it be known that I love the looks and most-of-the-time the sounds of the full-system T4 on my 650R. But... Sometimes the sound level is on the dark side of too loud, too raspy. So, three quick questions: 1. Can the T4 be repacked? 2. If "yes", does repacking make an impact on the noise level? 3. If "yes", is there one repacking system that is consiidered preferable over others? Thanks!