
My original (standard) lead screw bent a bit when I was trying too hard to fit the mount (all my fault). In the end I decided to replace it with this one. For the price it does what it should. I received 2 bars with 2 nuts wrapped in bubble wrap and they appear to be straight (or at least nothing flashy). I didn't use a copper nut as my Ender 3 only comes with a 2-bolt rectangular nut while it is a 4-bolt round nut. I had no problem installing it into an existing nut. The only downside is that it's about 35mm longer than the standard screw and protrudes beyond the frame of the printer. I could try trimming it down later, but it doesn't detract from anything other than the aesthetics.

Iverntech MGN12H Linear Rail Guide With Stainless Steel Carriage Blocks - 700Mm Length For 3D Printer And CNC Machine
9 Review

Iverntech MGN12 700Mm Linear Rail Guide With MGN12H Stainless Steel Black Carriage Block For 3D Printer And CNC Parts
9 Review

Iverntech MGN12 700Mm Linear Rail Guide With MGN12H Stainless Steel Carriage Block For 3D Printer And CNC Parts
11 Review

Upgrade Your Furniture With Happybuy 10 Inch Stroke Electric Actuators - Heavy Duty 6000N DC 12V With Mounting Bracket For Recliner, TV Table, Lift, Massage Bed, And Sofa
9 Review

π Wheels Manufacturing Ball Retainer Bag: Convenient Storage and Protection for Your Ball Retainers
6 Review

Linear Clamping Support Bearing by Sydien
4 Review

Enhanced Performance Sydien SCS12UU Bearing Bushing Diameter for Precision Machinery
4 Review

Electric Guitar Strings Ernie Ball 2221 Regular Slinky - (10-46)
5 Review