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Important addition to 650 builders guide -
Building fuselage - 6-B-5
Instruction 6-B-5 - page 8 installing upright channels.
Before back drilling through attach plate into upright channel, do steps on pg. 10 &11 to clamp 6-B-5-3 and align centerline to fuselage CL. This sets angle and position of sides before back drilling channel. Check this position with plumb bob or laser - or you will need to order new channels!
Larry Zepp CH 650B