Position U-brackets, mark and drill1/8" holes and secure into place with 1/8" HM-14 rivets.
Mount HF-122 curved cross brace and secure into place with AN3-14A bolts and locknuts.
Position and drill rivet holes into fabricated steel U-bracket and secure with 1/8" rivets. Secure HF-121 to bracket with AN3-14A bolt, steel washer and locknut.
Position and cut to shape and deburr boom brackets HB-17 L&R and secure to HF-121 and boom tube doubler plate with 1/8" long rivets HM-14L.
