LightBurn Compatible LX4s C02 Laser Controller Board LightBurn Compatible K40 Upgrade Board [LX4s] - $131.96 : VMS, Velocitronics Motion Systems
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Amazon.com: Monport 40W Co2 Laser Engraver K40 Motherboard Upgrade Controller Compatible with Lightburn for K40 Laser Engraver, Suitable for Various of K40 Upgrade Compatible with Lightburn
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