Carl Goldberg GPMA1926 Monster Pitts Electric ARF - Manual (Page 9)

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3. Slide the stab into the precut slot in the fuselage.
Measure each side at the trailing edge to make
sure it is centered.
this dimension same
on both sides
6. Insert a t-pin in the top of the fuselage in the
center at the firewall. Tie the string to the t-pin
and measure to the tip of the stab. Put a piece
of masking tape on the string where it crosses
the tip.. Swing the string over to the other side
and make sure the dimension is the same on
both sides. When you have this the same the
stab will be square with the fuselage.
T-Pin
4. Bolt the wing in place using the 6-32 x 1-1/4”
socket head screw.
5. Sight the stab from the rear and make sure that
it is parallel with the wing. If required, remove
a small amount of material from the stab sad-
dle to make the stab align with the wing.
7. When satisfied with the alignment, make a line
top and bottom and on both sides of the stab
where it meets the fuselage.