Thanks for your great response. I learned more than in all my poking around at the Emlid website, RTKLIB manual/ tutorials and trial and error. I, like many of the users are not software experts, but merely "beggars at the banquet ". Given that my next choice for true survey RTK would have been $10k or more, so I am very happy to have this opportunity . That said, one solution will be make my Base setup more mobile. Current problem seems to be range limitations of the 3DR radios and line of sight. Have looked into LoRa but apparently only available with RS. Any recommendations would be welcome. So, thanks for the good advice, and I do think I got my money’s worth.