Thanks @CrossRoads .
@CrossRoads is correct.
With a M8N you have you don't have that option. You have to do the processing at a base station to get the fix and yeah in my tests it looks like a foot or two so a meter would be about right. The M8P which is a real ppk and costs about $240 each (would need 2) can accept a RTCM3 stream so you can set the M8P up for a correction stream using RTCM3.