Need help from anyone near cleveland with LS-1 DS

Hi, I need to ask a favor of anyone near cleveland who has a 6-speed car with an LS-1 DS. I am trying to diagnose a bad vibration issue, and I don't know if it's the DS or the new Moser 12 bolt. My current DS is a custom steel shaft that my DS maker says is balanced perfect. All I need is someone willing to use my DS to see if it causes a vibration. I will do the removal and installation and I am estimating the the whole experiment to take under 45 min. I hope one of you can find the time to help a fellow f-body guy I will also throw in a 12 pack of your favorite brew. This is a time sensative issue, as I was planning to take a road trip to florida I am leaving saturday March 8 th. and I need to have this problem figured out before I go. Thanks
Aleks