bed thumb screw Anet A3

Basic thumb screw for Anet A3 bed leveling adjustment mod:

1: Drill out threads in bed frame
2: Apply heat resistant thread lock to screw and screw nut right up to the bed to lock the screw in place (repeat for all 4 screws)
3: replace bed with springs back onto bed frame, threading screws through the now drilled out holes.
4: seat another nut into the bed adjustment thumbscrew
5: gently push down compressing the springs to reveal the bed bolts and thread on thumbscrews (repeat for all co