Hello Bruce,
sorry I do not have a solution but only some questions:
As I use the same box (Orbsmart RX-01) I tried to install Armian on it ... without success, the box allways starts Remix. No errors, as if there is no sd-card inserted.
First question: where did you find "ARMBIAN 5.32 user-built Ubuntu 16.04.3 LTS 4.14.0-rc2-next-20170929-amlogics905x" ?
Second question: Did you format the sdcard before installing the iso with etcher? Which parameters did you use?
Would be nice if you could help me,
Greeting from Germany
Ralph