this design Is straight up plain knex,(minus the wheels), this means that there are no elastic bands, springs, or flexi-rods included in the design. please feel free to modify the design and post your variation in the I Made It section. Happy building!
Step 1: The Main Frame
try to replicate the images as best as you can. Please comment if more pictures are needed.
Step 2: The Axel Arms
replicate the pictures as best as you can. Please comment if more pictures are needed.
Step 4: Finishing Touches
add wheels to the yellow rod on the Axel Arms, they should spin freely.