The Tronxy X5sa has a little gap on the linear rods for the z axis, and if you miss a little info on the assembly instructions you can end with a slightly bowing Y axis that will make bed leveling highly annoying.
Since I forgot the spacers and am too lazy to disassemble everything I printed those on a different printer.
Use the screws on top to make sure the rods are centered, then squeeze those holders on each side, and then loose or remove the top screws.
Needs 1 M5x10 screw, and a T or square nut to affix to the extrusion. Step file included.
The author hasn't provided the model origin yet.