E-flite Apprentice 15e RTF with DX5e Radio - Manual (Page 7)

7 E-flite Apprentice Assembly Manual
 2. Slide the pins on the bottom of the fin through the
holes of the stabilizer and into those in the fuselage.
Make sure to seat the fin completely down on the
horizontal stab. You might need to push the fin down
with some slight pressure to fully seat it.
 3. Use a #1 Phillips screwdriver to install the two
2.5mm x 12mm sheet metal screws that secure the
tail assembly to the fuselage. Tighten the screws until they
stop. Do not overtighten as you may crack the plastic.