LightBurn Compatible LX4s Enhanced C02 Laser Controller Board
[LX4s]

First....Absolutely top notch support. Second...Incredible board and firmware. This single upgrade elevated my k40 to professional grade status. It has transformed the machines abilities and the quality it can produce. The instruction manual alone is worth the price. 100% happy with this purchase and the support Eric has provided to overcome my inability to read the manual properly.