# Z - Axis: Inconsistent Pocket Finish

**URL:** <https://community.inventables.com/t/z-axis-inconsistent-pocket-finish/19228>\
**Category:** Troubleshooting\
**Created:** [January 25, 2016, 5:57am UTC](https://community.inventables.com/t/z-axis-inconsistent-pocket-finish/19228 "2016-01-25T05:57:16Z")\
**Posts on this page:** 1\
**Showing post:** 20

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**Author:** ![AaronMatthews](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/aaronmatthews/32/73728_2.png) [@AaronMatthews](https://community.inventables.com/u/AaronMatthews)\
**Post date:** [July 11, 2016, 3:17pm UTC](https://community.inventables.com/t/z-axis-inconsistent-pocket-finish/19228/20 "2016-07-11T15:17:54Z")

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I was going nuts trying to eliminate that last bit of flex in my gantry.  
From what I can tell part of it is the X axis rails twisting. The stiffening mod reduced it but did not eliminate it. It looks like it is the aluminum rail itself that is twisting. I don’t know if that last bit of twist can be eliminated without changing materials.

Part of it is coming form the Z axis assembly.

I gave up decided to do a [Gantry Upgrade to C-Beam](https://community.inventables.com/t/gantry-upgrade-to-c-beam/23666)

But many people have reported good results replacing their Z axis. Either with a lineal rod setup from e-bay or a c-beam setup for open builds.  
When disassembling mine the lower adjustable v wheel was really messed up on my z axis. The bracket hole damaged, the screw bent.

And there are roomers of a single gantry rail upgrade from inventables may be in the works.

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_[View the full topic](https://community.inventables.com/t/z-axis-inconsistent-pocket-finish/19228)._