Install the Y belt mount onto the Aluminum plate using 4x M3 x 12 SHCS and M3 washers.
Tighten bolts all the way down.
Install bearing holders using M3 x 12 SHCS and M3 Washers.
Orient the step in the bearing holders towards each other.
Make the bolts tight enough that the bearing holders can't move up and down, but can still move side to side.
Install 4x M3 x 12 SHCS into corners of Aluminum plate.
Take close note of bolt locations.
Install bed corners using a M3 x 12 SHCS, M3 washer and a extruder (bed) spring.
Set the end of the bolt flush with the bottom of the plate for now.
Install bed finger as shown using a M3 x 12 SHCS and M3 washer.
Repeat in all 4 corners.
Install belt clamps using M3 x 12 SHCS and M3 Washer.
Leave the belt clamps loose at this point.