Step 3: X Axis
Mark, drill and tap with a 6-32 tap the bottom of the stepper mount. Attach the stepper mount to the bottom plate with 6-32 machine screws.
Attach the stepper to the stepper mount. My stepper used M3 screws.
Mount the linear rail to the bottom plate using 4-40 screws and nuts.
Drill holes in the laser mount flanges and mount to a 2 hole bearing block. (I know it shows a 4 hole block in the pictures you should use a 2 hole block.)