Here are a few of the things I've been working on: ( larger images under the cut )
These only exist digitally so far, but I'm hoping to build the first chariot this week (mostly as a prototype for the others, but I'm sure we'll use this one in the back somewhere too). I've already taken salvaged wheels from my old wrecked bike and ordered some axle parts from McMaster-Carr ... next step is raiding our scrap wood pile to build the box.
In other news, people near San Jose should check out Triangle Machinery
before they close their doors in August - there are just piles and piles of fabulous industrial surplus in need of a good home: gears, motors, tubing, drill bits, oscilloscopes, and more! I myself am now the proud owner of a control pad for a robotic arm (only $5!). I don't have the robotic arm, though; I'll have to see what I can do to remedy that.