Creality 5W laser small 2040 carriage

About

Compact X carriage for standalone engraver machine based on Creality 5W laser module that I want to make. 
After the disassembling the old printer I've got some 2040 extrusions so I decide to make the small laser cutter/engraver. I like how simple this project is but the X carriage is too large for me. My module is about 50mm width only so I need more compact one to get as big working zone for current extrusions (x2 325mm and x2 395mm) as possible. I plan to reach the work area size around A4 paper (or US “letter” size if you wish) with this carriage. Also the motor was moved up for this purpose: it can move above the frame extrusions freely.

The design is pretty simple. I'm reusing the parts that I own:

• x3 POM wheels
• Salvaged NEMA17 motor (the pressed-in GT2 pulley was removed roughly)
• x3 M5x45 hex screws from printer's Z carriage
• x3 M5 nuts

Also you need:

• New 16 tooth GT2 pulley that you can fine tune
• x6 M3 heatset inserts
• If you don't have enough x6 5x9mm bushings then you can print mine sleeve.stl

Printing

I will make it from ABS. No supports needed. 4-6 walls and 15% infill will work fine.

Reflections

I'm thinking about adding the air assist to my module if it can make any improvement to the cutting proccess. I know that diode 5W laser sounds like a toy unlike the serious CO2 machines but even 5W is enough for many household DIY reasons.