Here are some old pictures from building a previous iteration. For those keeping score at home, this was version 4. I'm currently on version 4.5, but for some reason I didn't take many pictures of that one. The changes are mostly tweaks to the vertical axes and the piston walls. The bits of plywood you see in these pictures were just temporary, except the panel holding the Smoothieboard. That one lives on. And the zip ties. Some people use duct tape, I use zip ties.