Rowland ships Criterion with 4 Delrin balls that connect the audio chassis to the control unit. Have you put all 4 balls in place?? There is no apparent rocking motion possible with my own Criterion pre.
For more detail, se the article on stacking the Criterion Chassis on the JRDG Knowledge base at:
http://jeffrowlandgroup.com/kb/questions.php?questionid=397
G.
For more detail, se the article on stacking the Criterion Chassis on the JRDG Knowledge base at:
http://jeffrowlandgroup.com/kb/questions.php?questionid=397
G.