I have decided to upgrade my K40 by building a new frame supporting the XY rails and to increase the cutting area to 620mm X 450mm | K40 Laser Cutting Engraving Machine
40w Co2 K40 Laser Engraving Machine With Square Inner Rail Laser Engraver And Up And Down Table - Wood Router - AliExpress
K40 40W CO2 Laser Cutter - Mods [der-frickler.net]
كتاب مدرسي ملفت للانتباه عرب سرابو k40 laser linear rails - daydreema.com