Alfawise U30 Rail Bumper - Y axis cable slider

Have you ever experienced problems with shifting of the printing due to Y axis cable hooking / blocking at the left back rail (profile) and mispossitioning of the printing in Y axis? I have, and honestly speaking it was so annoying (especially at big / long lasting printings), that I have decided to design a bumper.

Update v7A 2019.08.26:
- changed geometry of the mounting holes to fit position of existing printer screws (left back "leg profile" - necessity of replacing M5 screws for longer,