Is it a bad idea to use a joker 1600 with a 30 inch Jem ball?

[Edith blazek]

Im hearing conflicting information on this. On one hand officially, the 30 is only listed as going up to the 800 (despite also being listed as taking a 2k tungsten bulb which the 1600 system can take), while on the other hand, some users say you can use the 1600 with the 30 inch Jem ball, so if anyone has experience of whether you can or shouldn't please let me know.