Thanks for such a comprehensive report.
Probably the E. papuana is one of the other ghost gums such as E. tessellaris or E. aparrerinja. These days E. papuana is reserved for the species from New Guinea and the northern tip of Cape York peninsula, so I'm assuming you don't mean it, unless it is surprisingly hardy.
Thee's some info at: http://www.anbg.gov.au/cpbr/cd-keys/euclid3/euclidsample/html/Corymbia_papuana.htm
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