Z motor mount (single/dual) - Ender3/pro/v2

I redesigned a new model which available for free on my patreon page:
https://www.patreon.com/posts/63463457

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Last update: added one with motor that is also adjustable in the X direction, 1mm from center in each direction (and Y)
file: "Z motor mount_XY_adjustable"
Idea behind this is that IF alignment is somehow off slightly in the X direction resulting in a Z screw wobble, for that reason, then it can be adjusted.

Use M3x8 everywhere
Not sure which is best, but you get the choice!

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I already had made a motor mount but this is one with a redesigned rail (using caliper to measure and tested multiple tolerances) to fit the creality aluminum extrusion perfectly (to a point that it probably won't work with non creality extrusions), just enough tolerance to slide easily but tight enough that it won't wobble.

But just in case, added one with looser tolerance

Use m3x6 or m3x8 for securing the t-nuts, use metal nuts if you have them
And m3x6 for motor mounting screws.

pre-screw the t-nuts loosely before sliding it in

I placed my motor about 1mm above the bottom rail (use a small metal hex tool under it before securing), not sure if that helped, but definitely didn't make things worse.
And push the motor as closely to the vertical rail before securing.

you want a solid piece, higher infill 35-40% gyroid infill.
I printed mine in PLA

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