Have a Cruizer II that we were using in the planter tractor and it will not hold a line very well comparing to my markers.  Would bounce from 6" to 2 1/2 feet at times.  Located in North Central KS and selected 138 differential  instead of Auto.  Didn't seem to help.  Status was healthy with a HDOP of 0.7.  Should the PRN on the Health screen be 1 when the satellite selected was 138?  I am in open field with no obstructions.  So, switched that Cruizer 2 with another I had in the sprayer and it held the line really well when compared to my marker (within 3-6 inches).  Same helix antenna and same settings.   I have updated the software before planting season.  This was a slightly used Cruizer 2 so have no other history on it.  Any ideas of what I got going on or do I need to send it in?  Have not called Raven Help yet so thought I would post here first.

TIA,

Rick