Mitutoyo Dial Indictor Mount for LGX Lite X-Carriage
The paper didn't work well for me, so i go for the most accurate approach using a dial indictor. You can turn off the machine, temporarily remove the cowling from the x-carriage, mount the dial indicator on, and manually move the carriage around the level the bed. Just remember not to manually move the carriage too fast to avoid the back current damaging your board.
BOM
The author hasn't provided the model origin yet.