I'm a French user of Cura 15 (and previous..) on a Leapfrog Creatr Dual.
Cura is the only Software I can use On the Leapfrog for Production ( I greatly thank's the Ultimaker Team, who stay in the RepRap Spirit..).
I show you the specs.
System Win 7 - 64bits.
Last Arduino Drivers
the USB on my machine is on Com 8 / 115.000 bauds.
Gcode : Reprap (Marlin/Sprinter).
I use the Printer with ABS from Color fabb, the results are ok for me ( for my use..)
For Colorfabb ABS and mechanical Part:
Layer : .25
Shell : .70
Width top / bottom : .75
Fill : 80%
Temps : 232°C
Bed Temp : 80