I have my plate mounted here as I mainly carry no more than two bikes but I wanted to be able to carry more like I did on the weekend.
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I'm also planning to work out some sort of light setup at some stage as well. Haven't heard of anyone here in Tassie getting pinnged but it's only a matter of time as there's hundreds of these type of racks getting about.
The Single Trail racks come with a number plate mount with bungies that can be attached around two bike tyres when you have a full load, but that doesn't address the covering of you lights issue.