Alex, gap,
I was not refering to problems with shaddow/AO maps. Thetricky part are are not due to the anchors but the chains:
The opposing sets of chains can be re-created by splitting them into smaller pieces but it is possible to use a single, repeated model. At least I was not able to create a mirrored instance of a 3D model in S3D. If possible, I would be very happy someone could explain the preocedure.