I have reviewed the Tribute FX Ep recently for RC Report magazine using the 450 890kV setup.
I am very impressed with the preformance. i was cautious when building , but plesantly suprized at the outcome!!
I was donig 3 ft high Knife edges on first flight, with what i think was a great and smooth Knife edge loop loop on the second flight!!
good duration with nice power combo, although i havent test props other that the recommended 10x7APC i think it was...forgot....
Tony