One of my four spacers had a closed end. I tried to drill it out and it went flying never to be found. I went on Amazon and saw nylon spacers at 2 and 3mm but no 2.5mm which I assume is what is needed(?) Please reply with the W x L to replace these spacers (I am not in the UK–so I am assuming I have to find replacements).**
In general I was pretty disappointed by the build quality. Nylon nuts won’t tighten–they slip as the get close to tight. Radio legs just flop around awfully lose. As I said my spacer was not manufactured correctly either.