To keep your Gemstart 4 accurate for decades, follow this schedule:
"Precision is a habit, not an accident. Clean your machine after every stone." gemstart 4 manual
A: Set the angle to zero. Place a digital angle finder (pro-tractor) on the quill. Adjust the pointer to read zero. Then mark new lines with a metal engraver. This is a standard field repair. To keep your Gemstart 4 accurate for decades,