Klaus Mikkelsen wrote:
 I haven't noticed any rocking from mine, but take a close look at the traction rings, they can cause this.
Klaus, brilliant! I checked and sure enough, one of the two traction tires was missing.  I put a new one on and presto, no more rocking.  I guess I should have thought of this, as in my experience no loco sheds its traction tires like a Roco loco.

David and Alan, I promise this concludes my posts on the topic of my Roco BR 221! smiley: happy

Tom