Had mine on now for a few weeks and not had them loosen off. Know what you mean about the spacers, I thought the same when I fitted them, had to look at the instructions a few times to check I had it right and hadn't missed anything.Cheers Adeyrob. Seems a bit daft that they give a spacer for one side which stops it spinning . I was thinking it may vibrate around when it's running .
At least they seem to be easy to deal with, some companies just aren't as helpful when you need help with their products.I had a chat with r&g today. They are sending me another thin spacer. They said they hadn't had or herd of any issues with the left side spinning when fitted.