Anycubic Mega Zero electronics box extension

I wanted to install BTT's stepper motor smoothers to my printer and found out that there is not enough space in the box to fit them and securely fix. After some experiments I got idea to print the whole bottom part with holder for smoothers, but then better idea came: just rise the box so it can be mounted to upper hole/rails slot. This model is about that. Bottom part is used as-is, stock metal cover & fan.

To fix smoothers I used model https://www.thingiverse.com/thing:3351822