I was hoping to get away with only having a base station and getting enough coverage for the correction signal with the xbee radios. Our location is very flat and the tallest point is the silo at my parents farm. turns out I better order the XLR version as the LR only has 20mw and the XLR can have 1 Watt. What I probably should have done is just order 3DR radios to make the connection, that would have been cheaper but not as clean to set up.
hopefully this is helpful for some of you,