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Thank you for your comment. You could try the alternative way of mounting it just like the make of user vampirex13 at https://www.thingiverse.com/make:578752

He has mounted it in the order mountplate-->spacer-->damper instead of mountplate-->damper-->spacer

This uses the same spacer design and the only extra requirement is that your damper has a big enough hole to fit over the pulley.

I have designed this spacer by taking the .stl of the original spacer I remixed, edited that in Tinkercad and saving it again as an .stl file. There is no 'original' but if there is another file type which you prefer and Tinkercad supports as an export format I will make an export for you.

Ender 3 Y-axis stepper motor damper spacer