Sherline's 4417Z Sherline CNC Lathe Leadscrew Lock Upgrade is a very good upgrade because backlash is a more critical problem in CNC, the normally recommended .003" to .005" of backlash on the leadscrew might not be acceptable in some instances. This modification to the leadscrew and the addition of a locking lever allows adjustable control over the leadscrew backlash.
4417Z Sherline CNC Lathe Leadscrew Lock Upgrade Instructions
CA Prop 65 WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance know to the State of California to cause cancer. Avoid inhaling wood dust or use dust mask or other safeguards for personal protection.
I can do all this through him who gives me strength. Philippians 4:13