Step 3: Trebuchet wheel support 2x
These 2 parts will hold the wheels. The wheels will be positioned between the wheel supports and the main side supports. When you have created these parts wait with drilling the holes. I did and this was not wise to do. This since the hole needs to line-up on all 4 parts (2x wheel supports and 2x main supports) so it is easier to drill the hole to the 4 pieces in one go.