I´ve designed a y-axis belt return pulley bracket, as the stock bracket is a bit rubbish.

Uses two M5 x 12 mm to secure to the frame, and one M5 x 30 mm to act as a shaft for the pulley

EDIT
I´ve added .STL for the 9 mm version.

Wanhao

Duplicator9

No

No

0.2

30 %

Nozzle temp: 200 C
Bed temp: 50 C
Printed on Ancubic Ultrabase glass bed