wetside issues

Been using mp10/40 for years and noticed my newer mp40qd guards are loose and don’t fit as snugly as before and actually vibrates off! Secondly the wet sides them selves fall off using just rubber spacer on 1/2” (12mm) glass. Many others have reported these observations on R2R and wondering...

I have two new mp40qd on my 75g tank (1/2” glass) and the wet sides have fallen off twice. I’ve pulled and cleaned them reattached and everything is fine for a couple weeks then. Drop. I pulled them and currently using gyre but I’d like to put at least one back after is solve the issue. Any...