Beastx MICROBEAST PLUS Manual page 260

Tail gyro
When setting up the system for the first time, start with medium gain in
HeadingLock mode. Then readjust the gain as necessary:
Low gain will cause the rudder control feel weak, the tail will break out on collective
pitch inputs and it will stop with overshoots.
will feel the tail having more and more precise stops and hold better and better on
jerky pitch inputs. But watch out! If the gain gets too high, the stops will bounce
back quickly and wagging will appear in fast forward or backward flight (or even on
take-off). In this case land immediately and reduce the gain! For optimum performance
set the gain as high as possible, just before the tail rotor starts to wag in fast forward flight.
Tail gyro response
In addition to the gyro gain adjustment there is a parameter called gyro response which
helps to optimize the precision of the gyro. Increasing the gyro response will cause a harder
stop and quicker response to rudder stick inputs. But if the response is too high, the tail
will bounce back after a hard stop and feel spongy when making fast direction changes. If
the response is set too low on the other hand, the rudder control feels dull and stopping
might be too soft. Ideally the tail should stop perfectly to the point without making any
flapping noises.
Before adjusting the gyro response make sure the maximum possible tail gyro gain has
already been determined as described above! The gyro response can be considered as
some sort of fine-tuning and adjusting this parameter will not have any significant effect
if the gyro is not operating correctly in general. Also note that after adjusting the tail
gyro response you may have to readjust the tail gyro gain once again, as these parameters
interact to each other.
For better tail gyro performance also check for correct servo horn length. In case you
can set the gyro gain only to a very low value and the rudder tends to oscillate very
easily, move the linkage ball further inwards to the center of the servo horn. If on the
other hand you have a very large amount of gain and the gyro still does not seem to
be capable of holding the tail rotor in any flight condition, move the linkage ball on
the servo horn further out from the center, to get faster response speed when the gyro
controls the rudder servo. Also you may use different (larger) tail rotor blades or higher
tail rotor speed to achieve better holding force.
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Increase the gain step by step. You