E-flite Divo 3D - Manual (Page 19)

19 E-flite Divo 3D Profile Assembly Manual
 2. Use a small round file to relieve the inside of the right
fuselage doubler so that the tube will fit in the center of
the fuselage at the firewall.
Important: The amount of right thrust is specifically
designed into the airframe for indoor flight. If you will
be flying your Divo indoors and out, we recommend that
you reduce the amount of thrust to 2 to 3 degrees. When
using the Carbon tube mount with the Cyclon Micro, use
a round file to relieve the inside of the right doubler and
glue the tube in with the reduced thrust angle.