I think we should all hold from speculating until the vendor has had a chance to respond. I will PM you the contact information I have for Joe at Chequered Flag.
Sounds great! Yeah, it does sound like an L series still somehow, that was my first thought as well. Cool that it's in a car that's a driver and not a garage queen too.
Probably the "reaction disc" in the booster. A common enough problem that it has an FAQ entry.
http://forums.hybridz.org/topic/69706-reaction-disk-pictures-and-walkthrough/