Ok so…
NAD83 Base, WGS84 in Emlid RV3, No Emlid Transformation, Transform to NAD83 using PC software
or
NAD83 Base, NAD83 in EMLID RV3, Emlid Transforms, No processing required by PC
These would be the two conditions, would the second be not be simpler? The second case is the whole reason for RV3 I thought to be able to work in the local projection, the first condition would be for the original RV2 before the extra capability was added.