and sometimes fingers get crossed.  Sorry guys.  The abd was supposed to be and.  Missed with my typing finger and hit the b in place of the n. 
rdstair, can you post a Screen Snapshot of what the Si and Di sonar looks like.  Try getting an image of the combo Si - Di sonar View.  I had someone on this or another web site that was having almost the same problem but it was due to the Si sonar not working, which I noted after seeing a Screen Snapshot of what they were seeing. 
The Di sonar comes from the Si sonar; so what helps the Si sonar looks better (like a slower moving boat) should make the Di sonar look better.