Install the double bearing holder and single bearing holder using M3 x 12 SHCS and M3 Washers.
Take note of the double bearing holder orientation. The end of the bearing with the step should be on the opposite side of the notch on the X Carriage.
Do not tighten the bolts all the way down. The bearings will be tightened later and must wiggle at this step.
Using 4 M3x12 SHCS and washers, install X Carriage guide as shown.
Tighten bolts all the way down.