I did a remix in Tinkercad to combine the halves, then increased the scale in the slicer to 120%. The scaling was just my preference, you can leave the scale as original .
Printed using Cura 2.6.2 in PLA @ .1 resolution with supports touching the build plate only and 0% infill. The print time was quite long but it turned out well.
I Forgot to mention @120% the size is 195mm x 134mm x 138
Supports on the build plate only.