Hi mate, the fet can only be had on the 3.0 that you have or the max heads which I have purchased actually since this thread last cropped up! What are you running then a 1x8 and a 2x10? There should be no problem with the head, I have used my 3.0 through my 2x12T and i is not that far behind the 6.0, the 9.2 Max is another beast alltogether