you're right, the manual does say to disable the stock gyro when adding a g90. i figure john adams was tweaking around and recently discovered this. the writer of the rc heli article says he saw john's helis and spoke with him about the modifications during the 2007 las vegas heli fun fly. btw, the article mentions his credentials: technical director of horizon hobby (imho this makes his claims more credible). there's still a chance this trick won't make it in the manual, at least until they include a DD tail upgrade in the manual to go with it.

as far as putting the external gyro (HH/g90) after the 3n1, it doesn't work because the 3n1 outputs to the tail motor, as opposed to a standard servo pwm signal. starting with a 100% gain HH signal, then using the rate gyro to damp it makes sense to me. i figure if you had the hh gyro after the 3n1, you'd still have terrible wag at 100% gain because that's just how hh works with a tail motor.

so i suppose nobody has tried this trick yet? i do have an esky 4n1 that isn't being used right now. i could remove the 3n1, shrink wrap it, then install a DD motor & prop (i have a spare gws DD motor & a 3020 too) to complete the package. the biggest problem i'd have pulling this one off soon is i have a brushless tail on there now; it would take me several hours to complete the work, so i wouldn't be able to comment on anything for at least a few days (work & life are keeping me very busy).

perhaps some of you that are already running a g90 with DD as shown in the eflight blade cp pro manual (with a 3n1), could go ahead and turn those 3 screws and see how it goes (yes, if you already have a g90 with a 3n1, it's that simple to "activate" john adam's "killer tail setup", turn the g90 full cw, turn the 3n1 propo full ccw, turn 3n1 gain 25% CW). i figured by the time i got off work at least a few of you would've figured it out and posted how awesome it works, and how you couldn't believe you were flying with the 3n1 gyro turned off! c'mon now folks, where's the enthusiasm?

here's a quote from the article if you need some help getting motivated: "continuous flips at knee high... backwards circuits at top speed (~40mph) are easy, as the tail happily maintains heading even through backwards loops & rolls. garbage can size funnels, right side up and inverted a foot off the deck..." p109, may 07, RC Heli Magazine.