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STEP 4 (See Diagram 4)
A.) Attach the Butterfly Base (#11) to the front of Middle Vertical Frame (#9). Attach the
Butterfly Pulley Bracket (#14) to the Middle Vertical Frame. Secure them together with two
M10 x 2 ½” Carriage Bolts (#88), two Ø ¾” Washers (#107), and two M10 Aircraft Nuts
(#110).
B.) Attach the Butterfly Stopper (#31) to Butterfly Base. Secure it with two M6 x 3/8” Allen Bolts
(#58).
C.) Attach the Backrest Board (#39) to Middle Vertical Frame. Secure it with two M8 x 2 3/8”
Allen Bolts (#103) and two Ø 5/8” Washers (#106).
DIAGRAM 4
13
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