Upper arm and steering rod assembly, the ball joint of R2 have much improved from R1/S2, it's much better. Fit with the balls and move smoothly.
First drill the hole for those ball joint.
then use the tool which come with the box and a 4mm wrench, set-up tjose tumbuckle much easier with those tools.
And the steering which connect the servo to the steering unit, need to cut 4mm of the ball joint.
