Fantastic thing. As a previous commenter said, just needs to accommodate a rotary encoder to be the ultimate oled housing.
This one is pretty much the ebay standard encoder usually for an Arduino. https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=5v+mini+rotary+encoder&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=5v+rotary+encode
I'm terrible with CAD :( Or I'd relocate the GOTEK LED's and USB up to the OLED Housing as my GOTEK is internal and in addition to the floppy.