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The right/left threaded linkage is made
from the right/left threaded pushrod D541,
a ball joint M3 D72 and a shortened ball
joint M3 D578. The shortened ball joint is
placed on the side with the rightturning
thread (cw, no thin groove on this side).
For turning the ball joint you can use a
3mm Ø hex wrench. But the first turnes
should be made from hand.
Rough length of the double ball joint R/L
linkage.
Attach the double ball joint linkage with a
lense screw M3x12 989 and enough
Loctite on the long blade grip arm.