Spring powered ball cannon

This is my spring powered ball launcher. You will need the following: 3D printed parts 3-4 springs (the longer the better, I recommend using ones that are larger at base then get smaller) Double sided tape Regular tape String That's it! Now we start building: Grab the string and pull it through the pull handle's holes Now, get the larger disk and put it slightly inside the tube then tape it on Grab the string from the pull handle and put them inside the holes from the larger disk that is connected to the tube Pull the string that came out of the larger disk fully out from both holes, then grab your double sided tape, cut a piece off, and then put it on the bottom of your spring. After stick it to the larger disk on the side that is deep into the tube. Repeat this process for the other springs. Cut a piece of double sided tape and stick it to the top of one of your springs. Repeat for the other springs. Next, you grab the smaller disk and put the strings through the holes Then, you drop the disk inside the tube and push it a little Finally, you pull the strings tight and at the same time tape it to the smaller disk Now it should be done! If you have any problems tell me in the comments.