J-066 is used by the Royal Netherlands Air Force for the test and evaluation of the release of various weapons, missiles, fuel tanks, etc.  On test aircraft, all non-standard internal wiring ('jumpers') are coloured orange, so this jet acquired the nickname "Orange Jumper", which explains the kangaroo on its tail.  A modified Orpheus Pod with additional instruments is often seen mounted on the centerline pylon and the special painted fueltanks make it a very coloured model.There's one full colour instruction sheet, a full set of reinforcement plates and one Orpheus Pod is included in this set.