We also use the Echo with manual Capture stations as our backup, and have Liss tubes available as well. We very rarely go back to the tube methodology, only in those patients with a known adversion to solid phase. Manual Capture and the Echo do not correlate all that well even though they are the same reagents. The reactions are much stronger on the Echo. I was told that this is probably due to the heating mechanism in the Echo, it comes to temperature much sooner. All you can do is report what you get.