Updated: Z-axis Anti-backlash 1/4-16 Acme Threaded Modification

Build Anti-Backlash for 1/4-16 Acme Z axis rods
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Materials Needed :
- 2x 12" 1/4-16 Acme Rod (McMasterCarr #: 93410A904 per)
- 4x 1/2" wide nuts (McMasterCarr #: 94815A007 per)
- 1x spring (McMasterCarr #: 1986K94 package of 6)
- 4x (3mm or 4-40) x 1.5" long bolts and matching nuts
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The top nut will press fit into the top and the bottom nut will be loose. The bottom nut should also be within the case so no pressure from installation interferes or presses on this nut. The top