4x DC/DC Stepdown Converter with mount

My printer is running with only one 24 V DC PSU.

To get 12 V DC for fans and light i used this tiny step-down converter.
These deliver a constant voltage and are easy and very precise to adjust.

To adjust voltage for fans and light separately i build this 4x converter board.
1x electronics cooling fan
1x hotend cooling fan
1x lights
1x reserve

One picture shows the converter board in comparison with a A4988 stepper driver.