Here are some close up shots. As you can see, I routed the tubes under the psu, 1 to the left of the plugs, 1 to the right, and then squeezed between the psu and front of the case. This way there’s only 2 bends and easy to place and remove.
Tubing I used was: Tygon R3400 - 8MM ID - 11.2MM OD -...