Ted,

We connected a NAV2 with 4.51 to an InSight with 5.0 in a SPX3185 yesterday.  We are using a 332 on RTK.  When we loaded one field, we did not have the cross track error on the on screen lightbar.  Loading a second field, then reloading the first field fixed that problem.  I calibrated the AP on the unit and spent several minutes fine tuning it.  I did not have any further problems after that and the unit appeared to work fine.  Are your problems confined to the Omnistar signal?

Don