This show the close fit of the sides and kick wheel which was by design. You just tip up the sides and lock them in place. There is heavy chain to support the side decking. I'll see if I have a photo of the finished wheel to illustrate the final build.
At this point the build was largely done. It's first use it didn't even get the stain or weather proofing. I was likely finishing a few bits on site. It's not a real project if your not building the last bits while the 'customer' is watching you. :P