My Billies/Billys developed sag under all those A4 archaeological monographs (and JRMES!) so when I moved back to Scotland I sacrificed one (ritual, innit?) to reinforce the others with central bracing. Did the trick.
Roman Military Equipment
The nice thing about Billy bookcases is there are lots of examples of mods to reinforce them because they’re so ubiquitous. This is one example: youtu.be/u_caV1-mj_o?...
