Closeup of the connection between the porteur rack and base rack.
Alistair said that it was a lot of work to get these properly aligned. The clearances between the spigots and sleeves are minimal (necessary to keep the porteur rack from moving around).
The spigots extend a little bit so that we can thread them for wingnuts if necessary. Right now it looks like the two bolts at the dropouts will be enough to properly secure it.
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