I'm just in the middle of replacing my anti roll bar bushes with Powerflex ones. I have the early version of the 21mm ARB, with the two-bolt brackets. When I took off the old bushes, which were the original VW ones (and in surprisingly good shape) I was a bit surprised to find a small rubber packing piece on both bushes. They look like they are made from a piece of heater hose or something, and were presumably put there in the factory, as there's no sign of anyone ever having disturbed the factory-marked bolts before me. When I cleaned up the mounting brackets and tested the Powerflex bushes in situ, they seem to be quite a loose fit in the mount, without the ARB itself passing through the middle of them. So, my questions are: Has anyone else seen this before? Should I re-pack the new bushes when they go back in, or try to "adjust" the mounting brackets themselves?
Here's a (poor quality) photo, to help explain what I mean. Left to right: mounting bracket, packing piece, old rubber bush, new Powerflex bush.

Thanks,
James