Great gyro, the ACT Fuzzy Pro V3.

Extremely sensitive and precise.
For jets, do not use more than 40% max sensitivity (better to limit this on the ATV of the transmitter instead of on the manual potmeter on the device itself), and get fully confident with it in "Normal mode" (I do never use "AVCS mode" )
Be sure you can open and adjust the sensitivity proportionally by means of a TX slider, so you can immediately turn down the sensitivity a little in case the model starts to wag (high speeds, oversensitivity,...)
Don't experiment with a on/off switch for the initial sentivity, the wag can be very violent, better to open it very slowly and observe what the model does.
Use very fast and precise servos, only in such case the gyro can really do its work properly. I use brushless servos Futaba BLS451 and in the past used Futaba S9450.

In case of risk of tip stall, remember that the gyro will try to correct to such extent that you will not be warned anymore of the tip stall and will cause a flat spin at the opposite side of the correction (=to the side where the aileron is fully down)... Therefore : keep the plane speed safe or lower the sensitivity considerably at risky low flying speeds (especially on landing) ! I decrease the sensitivity with about the half on final approach, which is still enough gyro for that "Rolls Royce feel" and blindfolded touchdown.

One minus on the gyro is that the top and bottom halves of the plastic case are held together with the paper (!) sticker ; put it in transparant heat shrink (wich is also a much better base for double sided foam tape).

Last advice : for battery F/S : change on your transmitter the gyro channel from "Hold" into "0%". When your battery pack lacks power, you certainly do not want the gyro servos to drain all what is only left there and cause a battery failsafe situation by dropping the voltage too low ! "0%" might restore a safe situation.

Good luck !

PS. The owner of ACT, Klaus Westerteicher, speaks good english !


Nicolas.