Hobbico FlyZone Micro Ultrix Sky Screamer RTF Manual page 8

If you have an airplane that follows either path (A) or (B),
cut the sides the elevator as shown in the photo above.
If your airplane follows path (A), bend the elevator
tab up.
If your airplane follows path (B), bend the elevator
tab down.
3. Repeat step 2 until your airplane follows path C.
RUDDER TRIMMING
D = Airplane turns left.
E = Airplane turns right.
If your airplane turns to the right (E) during glide tests,
bend the rudder to the left.
If your airplane turns to the left (D) during glide tests,
bend the rudder to the right.
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