you will need to have patience when printing this Project of an engine. It does work, But you will need to tinker with it to get it to work properly. other than the 3d printable parts, you will also need to purchase some nuts and bolts from your local hardware store. They are listed below

• 1/4 20 bolt, 1 in long x4-1/4 20 bolt 1.5 in long x 2-1/4 20 bolt, 2 in lnog x 2-1/4 20 nut x8Enjoy the biuld and feel free to send me any questions!Note: i recomend you pick up fine grain sandpaper as it helps to sand the contact surfaces of all of the parts.