DIY Mini 3-Axis PCB CNC

I made a simple and inexpensive cnc. It consists of only 20 pieces of printing. I've added the parts to the file so you can improve the CNC. (Two heads are better than one). If you want to do this project, the bill of materials;
(Note: I renewed the table and motor holder)
3x Nema 17 Stepper
4x 8mm Smooth Rods 22cm
2x 8mm Smooth Rods 15cm
12x LM8UU Bearings or https://www.thingiverse.com/thing:2202854
2x 608ZZ Bearing
3x M8 Nut and Mill(22cm and 15cm)
3x Coupler Lead to Nema or https://www.thingiverse.com/thing:1329750
12x M3x40mm Screw
12x M3x12 Screw
12x M3x12 Nut
4x M4x30mm Screw
4x M4x30mm Nut
1x Arduino Uno
1x Arduino cnc shield
1x Power supply 12V 3A
3x a4988 step motor driver
3x a4988 heatsink
1x High Speed Spindle Motor
3x Endstops
2x Fans
1x 18mm x 240mm x 240mm wood
1x1W led
If you need more information about the software, see these links:
https://github.com/gnea/grbl
https://github.com/winder/Universal-G-Code-Sender
https://www.vectric.com/pr