I almost finished building my CNC engraving machine using parts from ARCO System kit, stepper motors from 3D printer that broke down, and engraving motor from a too-small CNC engraving machine. I'm using GRBL Panel. I found out that the X and Y distances are off. From the readouts in GRBL Panel, I got 9.993mm instead of 10mm. I tried to watch the video at https://openbuilds.com/projectresources/howto-calibrate-your-cnc-machine-for-mach3-or-grbl.145/ but I'm hearing-impaired and the closed captioning is screwed-up. How can I calibrate the machine?