Anet AM8 - 12mm Y axis upgrade

*Note: This is only a tiny part of my AM8 upgrades. You can find the links to the other parts at the bottom of the description.*

About
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This upgrade intends to improve the stiffness of the AM8 Y Axis. The goal was to keep AM8 compatibility while increasing the Y stiffness, especially when using longer Y rods for a 300x200 bed. In my case the Y rods are 480mm long.

I'm using these housings along with the 12mm upgrade:
https://www.thingiverse.com/thing:3016075

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