IKEA furniture is great for small adjustments to fit your needs. Not costing a fortune also makes it easier to experiment with it. Since they're so common, it's easy to find CAD drawings for most of them. I did a small hack/conversion on a Billy closet to hide some pipes in our apartment. https://vanderwalt.de/blog/customizing-ikea-billy-to-hide-pi...
This look lovely and probably felt extremely satisfying once everything was said and done.
I've been pretty disappointed with "medium quality" slightly more expensive furniture from places like west elm and pottery barn.
Now I will either get older recycled furniture for quality or pieces from IKEA for cost.
I’ve just put an IKEA kitchen in. I had to do a very similar modification to fit the plumbing in.
My mind immediately went: I’m sure there is some German law or ordinance or regulation against hiding your Gaszähler. This surely goes against die Niederdruckanschlussverordnung.
Now that you have published this online, police will visit you to remove the Billy!
Perhaps I am too pessimistic with German laws.
PS: It looks much better this way.