K40 linear rail upgrade

This is a simple linear rail upgrade for the K40 laser cutter.

I was tired of the wheels giving wavy lines and none smooth movement. I came up with this.

The linear rail i choice sits about 5mm higher then the stock k40 metal head holder.
This setup adds the linear rail and drops the lens back down. So the focus length should be unchanged.
Mirror 3 will be a tad higher tho, about 3mm.

Part list:

MGH9 H Linear rail 400mm long
3mm acrylic sheet
3d printed files (petg, abs or asa)
m3 screws (3x 6mm, 5x12mm (12 to 16mm)
m3 washer 5x
m3 drill bit and a good drill.
m3 nut 2x
super glue (not 100% needed)

Files :
Laser head holder - acrylic
2mm spacer - 3d printed
Carriage - acrylic
5mm spacer - 3d printed
Linear rail center tool - 3d print
Rail center tool 2x - 3d printed
One piece - untested all 3d printed.

Start by downloading and cutting/printing all the files.

Glue the 3d printed 2mm spacer to the acrylic lase head holder. Clamp down and let dry. (not