I'll try to explain this in a clear way, though i'm not so sure i could make it since english is not my native language.
The baseline idea was to place one of these horizontally:
https://www.ikea.com/it/it/p/kallax-scaffale-marrone-nero-20275885/
and one of this vertically beside it:
https://www.ikea.com/it/it/p/kallax-scaffale-marrone-nero-40275846/
Since i want to be able to clean under it, i wanted to place them on the Kallax base, but there's no 1 section wide base, just two section and four section, so i was wondering if it would be safe to use two of these:
https://www.ikea.com/it/it/p/kallax-base-nero-30495599/
one placed under the one section column and protruding under one side of the four section part, and the other on the opposite side of the four section part.
Could it work? of course I'd also need to join the column and the four section parts together for added safety, so if any of you have any hints on how to manage it without ruining everything, i'm open to suggestions.