For Tevo Tarantula 3D Printer owners with y-axis print bed wobble issues.
Even after fully adjusting the eccentric nuts to tighten the wheels against the aluminum extrusion, there is still play which causes the print bed to be loose and wobbly. The solution was to move the mounting holes closer together which allows the range of motion from the eccentric nuts to tighten the wheels fully against the aluminum extrusion.
Just replace the bed spacer with the printed part. Printed with PLA to make it as stiff as possible.