THATS IS AMAZING CUSTUMER SERVICE.
That itself would make me buy a set if I didn't have one before....
I am not interested in returning them as they are the best bang for your buck coilovers out there. I finally worked out all the small kinks with them, a little bit of Loctight, and the right tool and all will be well on the passanger side.
On the Driver side I would like to get replacement springs.
As far as the thumps in the rear, I am not going to be quick to blame, because I don't know the cause of the thump yet. It could be the asssembely order of the tophat and washers, or it could be bushings.. etc...
Either way later on this year I am planning to refresh the rear bushings with polyurathane powerflex bushings and check my subframe, so I will find out the cause then.
And I will give you a call tomorow afternoon.